The smoke from Vashek's keep rose in a column the colour of infected copper, twisting against Barbarus's permanent overcast before the wind shredded it into nothing. Mortarion stood on the ridge with his scythe planted blade-first in the rock beside him, watching the column rise, counting the seconds between each gust. His lungs worked in their slow deliberate rhythm. The air at this altitude would have blistered a baseline human's throat in minutes. He breathed it like water.
Below, his soldiers moved through the ruin with the discipline he had beaten into them across fourteen months of guerrilla war. Teams of four cleared each chamber. Medics followed with sealed pouches of antitoxin and wound-sealant. The slave pens were coming open one by one, and the sounds drifting up the ridge were the sounds he had learned to listen for. Weeping. Confused voices. Children calling for parents who might still be alive.
Darek climbed the ridge path with his breath-cloth pulled tight across his face and his salvaged lance slung across his back. He was thirty-two. Old for Barbarus. His skin had the grey undertone of a man whose liver was losing its war with the atmosphere, but his eyes were clear and his voice was steady when he spoke.
"Vashek's garrison fought to the last. No surrender offered, none given." He stopped three paces from Mortarion and pulled the cloth down to speak more clearly. "Ninety-one dead. Thirty-four wounded who'll live. Twelve who probably won't."
Mortarion did not turn from the smoke. "Names?"
"Being gathered now. Hesra's already writing them."
"I'll read them tonight." He pulled the leather book from his belt and held it without opening it. The binding was dark with years of handling. The pages inside held more than two thousand names in his cramped angular script. Ninety-one more. "The depot?"
"Full. Vashek was hoarding. Sixty corrosive lances in sealed crates. Sealed armour for twice that. Enough rebreather cartridges to supply our newest three hundred for six months."
"Distribute the lances to the Hesra contingent. They've been fighting with sharpened pipes for two months."
Darek nodded and lingered. Mortarion could feel the question before it came.
"Ask."
"Four overlords dead." Darek said it carefully, the way a man handles a blade he isn't sure is poisoned. "Six keeps taken. Forty-three villages freed. Eleven thousand fighters under arms."
"You're counting. That's good."
"I'm counting what hasn't happened." Darek looked up toward the peaks lost in toxic cloud. "Necare hasn't moved. Not once. Not a patrol. Not a messenger. Not a single reprisal raid."
I know. Mortarion's fingers tightened on the book's spine. The warmth behind his eyes pulsed once, faint and steady, the way it always did when his thoughts turned toward the highest peak. I know he hasn't moved. I know what that means.
"He's watching," Mortarion said. "He has always watched. When I was a child in his keep, he would let me struggle with a task for days before he intervened. He wanted to see how far I would push before I broke."
"And if he decides you've pushed far enough?"
"Then he comes down. And everything between here and his keep dies."
Darek's jaw worked beneath his breath-cloth. "That's not reassuring."
"It's not meant to be." Mortarion turned from the smoke and looked at the man who had drawn his sword first, a year and a half ago in a village square where golden light had burned the poison from the air. Darek had aged five years in that time. They all had. "He is the strongest thing on this mountain. Stronger than Vashek. Stronger than the six I've killed combined. His sorcery can strip flesh from bone at a distance I cannot close with a charge, and the air around his keep would kill every soldier in this army in seconds."
"Then how do we fight him?"
You don't. The thought came hard and cold. I climb alone. I have always known I climb alone.
"You don't," Mortarion said aloud. "When the time comes, the mountain's summit is mine."
"That's suicide."
"It's the only arithmetic that works. Eleven thousand of you would die on the approach. I won't spend those lives on a problem that has one solution." He shouldered the scythe. The dark metal caught no light. It never did. "Your job is everything below. Every overlord between here and the cloud line. Every depot. Every keep. Every village still in chains. Clear the mountain from the bottom, and when I go up, there will be nothing left for Necare to threaten me with."
Darek stared at him for a long moment. Then he pulled his breath-cloth up and turned back toward the path.
"Ninety-one names," he said over his shoulder. "I'll have them within the hour."
Mortarion watched him descend. The warmth pulsed again. Faint. Patient. The word brother lived in it still, buried deep, a promise he could not verify and could not stop believing.
Four overlords dead. Necare silent. He is not afraid of me yet. He thinks this is still a game. He thinks I will tire, or break, or come crawling back to the keep and accept the inheritance he designed for me.
He opened the book. Two thousand and seventeen names filled the pages in dense columns. He would add ninety-one more tonight, reading each one aloud in the dark before he allowed himself to sleep. The ritual cost him nothing but time, and time was the one currency he refused to hoard.
You are coming. I believe that. But I cannot wait for you. The mountain will not wait. Every day I hesitate, children wake in chains, and that is a debt I will not carry to whatever grave this world digs for me.
Below, the slave pens emptied. A child screamed, high and sharp, and then the scream turned to sobbing, and the sobbing turned to a name being called, and somewhere in the wreckage a voice answered.
Mortarion closed the book. Shouldered his scythe. Descended toward the keep to count the living.
The hall still stank of Vashek. Overlord keeps always did, for days after the killing. Something in the stone itself absorbed the corruption of their presence, a sweetness like rotting fruit laced with copper and bile. Mortarion had grown up breathing worse, but he noticed the others wrinkling their noses above their breath-cloths as they filed in.
They gathered around a table carved from the mountain itself, too heavy for Vashek's slaves to have moved and too useful to destroy. Maps spread across it, weighted at the corners with spent lance cartridges. Hesra sat at his right, her grey hair pulled back tight, her hands folded over a leather satchel filled with the evening's casualty lists. Darek stood at his left. The five contingent commanders ranged along the far side: Brenn of the Ashfall villages, Torva who had lost three sons before the rebellion's first year ended, silent Kaedis who never spoke unless blood was involved, Maren whose people had marched fourteen days through toxic lowlands to join, and old Urik who still carried the brand his overlord had burned into his throat forty years prior.
"Report," Mortarion said. He did not sit. The chair Vashek had used was a thing of fused bone and black iron, and he would sooner stand for a week than touch it.
Hesra opened first. "The last two fights broke the pattern." She pulled a cloth-wrapped bundle from her satchel and unrolled it on the table. Inside lay fragments of something that looked like obsidian but moved with a faint internal light, pulsing sickly green. "Overlord Kreth didn't just throw fire at us. He pulled the ground open. The fissure swallowed sixteen fighters before we could close distance. And the thing that came out of the fissure wasn't rock."
"I saw it," Kaedis said. Two words. From Kaedis, that was a speech.
"Vashek was the same," Hesra continued. "Stronger than his reputation. Stronger than our scouts predicted. The wards on his inner doors held against corrosive lances that should have eaten through in seconds." She looked up at Mortarion with eyes that had watched him grow from a gaunt child to a twelve-foot killer in two years. "Something is feeding them."
Darek leaned forward. "The prisoners confirm it. Three of Vashek's guard-captains talked before they died. Said the surviving overlords have been meeting in the Khareth Spire. Eastern peaks. They swore oaths to something. Wouldn't name it. One of them started screaming when we pressed him, and he didn't stop until his heart gave out."
"How many overlords remain in the east?" Brenn asked.
"Seven confirmed," Darek said. "Three of them we've never engaged."
Mortarion let the silence hold for three breaths. His lungs worked slow and even. The warmth pulsed behind his eyes, and he closed them for half a second, feeling it. Brighter tonight. More insistent. The rhythm of it reminded him of a heartbeat accelerating, someone running toward something.
You're closer. I can feel it. Whatever you are, wherever you are, the distance is shrinking.
He opened his eyes.
"Necare is building a coalition." He said it flatly, the way he said everything that cost him. "No single overlord can stop us now. Our numbers, our equipment, our momentum. They know it. So the survivors are pooling their sorcery, swearing pacts to powers they don't fully understand, and hoping that combined strength will do what individual cruelty could not."
Torva's scarred mouth twisted. "Let them combine. We'll kill them together instead of apart."
"It's worse than that." Mortarion picked up one of the obsidian fragments Hesra had laid out. The green light inside it recoiled from his skin. "These oaths they're swearing. The things coming through their fissures. They're drawing on something beyond Barbarus. Something that feeds on desperation and offers power in exchange for service." He set the fragment down and it cracked, the light dying. "The longer we wait, the deeper they drink from that well. And the things that climb out of it will make Vashek's wards look like children's games."
"Then we don't wait," Maren said.
"No." Mortarion placed his palm flat on the eastern passes. "We march in three days. Before their pact solidifies. Before whatever they've invited into Khareth Spire has time to root itself in the stone."
Urik touched the brand on his throat, an old habit. "Three days isn't enough to rest the wounded from today."
"The wounded stay behind. Fresh companies from the Hesra contingent move forward. Darek, those sixty lances I told you to distribute?"
"Already done."
"Good. Brenn, your scouts know the eastern approach better than anyone. I need routes that avoid the Thornback Ridge. The air there turned lethal last season and hasn't cleared."
Brenn nodded and began marking the map with a charcoal stick.
Mortarion watched them work. Commanders who had been villagers two years ago, planning campaigns against creatures that had ruled this mountain for centuries. The warmth pulsed again, steady and urgent, and for one moment he let himself feel it fully.
Brother. The word lived in the light like a seed in soil. I don't know your face. I don't know your name. But you are running, and I am fighting, and if you arrive before Necare kills me, I will forgive whatever cosmic joke put us on different mountains.
"One more thing," he said. The commanders looked up. "The sorcery is getting stronger. The things in the fissures are getting stranger. If any of you face something your weapons cannot touch, you retreat. Immediately. Without shame. You find me, and I will kill it."
Hesra's mouth tightened. "And if you face something your scythe cannot touch?"
Mortarion's cracked lips pulled back from his teeth. Something that was almost a smile, if smiles could cut.
"Then I hit it harder."
The eastern passes opened like a wound in the mountain's flank, all jagged basalt ridges and poisoned scree that crumbled under boots. Mortarion stood at the mouth of the valley with his scythe across his shoulders and watched the coalition's position resolve through the toxic haze.
Five of them. Five overlords who have hated each other for centuries, standing shoulder to shoulder on that ridge. That's not alliance. That's desperation wearing a mask.
"They've fortified the switchbacks," Darek said, crouching beside a boulder with his field glass pressed to one eye. "Three tiers. War engines on the second, their household troops packed tight on the first and third. The overlords themselves...." He lowered the glass. "Top of the ridge. All five together."
"Close enough to reinforce each other's sorcery," Hesra murmured. She stood at Mortarion's right, her breath-cloth pulled tight, eyes narrowed against the green-tinged murk. "You see the shimmer between them?"
Mortarion saw it. A lattice of corrupted energy connecting the five figures on the heights, visible to his eyes as threads of sick light woven between their bodies. Shared power. Pooled malice. Each overlord feeding the others, creating something larger than any single witch-king could sustain alone.
"They've been practicing," he said. His voice came out flat. Dry. The rasp of a man conserving air for what came next.
Brenn jogged up from the rear column, dust coating his rebreather. "Eleven thousand, arrayed as you ordered. Three ranks deep across the valley floor. Lance teams forward, shield-bearers staggered. The Hesra contingent holds the left."
"Good." Mortarion didn't turn from the ridge. "Their engines?"
"Something new. Looks like siege-bore platforms, the kind Kreth used, but larger. Three of them on the second tier."
Three siege-bores. Five sorcerers linked in a web. Four thousand soldiers on ground they chose, with elevation and prepared positions. The arithmetic lived in his chest like a cold weight. My eleven thousand will break against those tiers like water on rock unless the head comes off first.
Hesra stepped closer. Her voice dropped below the wind. "You're going up there alone."
"Yes."
"Five of them, Mortarion. Five overlords whose power is linked."
"I heard you the first time."
She grabbed his forearm. Her fingers couldn't close around the muscle, but the pressure was there, and it made him look down at her. Grey hair. Hard eyes. The woman who had fed him when he was a gaunt child stumbling down from the high keep with Necare's bruises still healing on his ribs.
"I'm asking if you intend to come back," she said.
I intend to. Intention has never been worth much on this mountain. He covered her hand with his. The size difference was absurd. His palm engulfed her fingers entirely.
"Hold the line. When the sorcery breaks, you'll know. Push up the tiers and take their soldiers apart. Don't wait for my signal."
"What if the sorcery doesn't break?"
"Then I'm dead and you retreat." He pulled his arm free. "Don't waste lives avenging me, Hesra. The rebellion doesn't die with one man."
She stared at him. Then her jaw set and she turned back toward the column without another word.
Darek lingered. "The numbers favour us."
"The numbers don't account for what those five can do together." Mortarion hefted the scythe off his shoulders and held it in both hands. The dark metal drank the sickly light. "Their soldiers are fodder. Slave-pressed conscripts and household guards who fight because the alternative is worse. Kill the overlords and the army collapses."
"Five witch-kings who've been feeding on something from the deep. Against one man."
"One man who spent fourteen years breathing poison they use as a weapon." The corner of Mortarion's mouth pulled back. "The ground favours them. The sorcery favours them. But they're afraid, Darek. Five rulers who have never cooperated in their lives, standing together because they cannot face me apart. Fear makes mistakes. I will make them pay for every one."
The warmth pulsed behind his eyes. Brighter than it had been in months. Insistent. Almost frantic, like a hand reaching through darkness trying to close the last distance between them.
I know. You're close. I can feel you running. But this cannot wait. Children are dying in the villages behind those five, and every hour I hesitate adds names to the book.
He began walking toward the ridge.
The valley floor spread behind him, eleven thousand fighters in salvaged armour with corrosive lances and crude shields, watching their king walk alone into the teeth of five overlords. Nobody called him back. Nobody tried to follow. They had learned, across fourteen months of war, that when the Pale King walked forward alone, the only thing to do was hold position and trust the dead.
The first ward hit him at two hundred metres. A wall of corrupted force that would have liquefied a baseline human. Mortarion walked through it. His skin tingled. Nothing more.
The second hit at one fifty. Hotter. Thicker. Green fire that clung to his war-plate and hissed against the leather of his hood.
Is that all?
He kept walking.
On the ridge, five overlords watched him come, and for the first time in centuries, the ancient witch-kings of Barbarus felt something they had forgotten the shape of.
The war engines screamed first.
Three siege-bores on the second tier opened their throats at the moment grey dawn bled through Barbarus's cloud cover, and the valley floor erupted in geysers of liquefied stone. Mortarion's front rank scattered by training rather than panic, the lance teams breaking into their four-man cells and returning fire before the debris finished falling. Corrosive bolts punched upward in disciplined volleys, striking the war engines' armoured housings, eating through plating in sprays of green-white sparks.
The coalition's household troops surged down the first tier in a wave of black armour and breath-masks, four thousand strong, their formation tight enough to suggest the overlords had spent weeks drilling them. They met Mortarion's shield-bearers at the valley floor and the sound was like a mountain splitting.
Hold. Hold. I need sixty seconds.
Mortarion was already running. His legs covered the broken ground in strides that ate ten metres each, scythe held low, hood streaming behind him. A lance team saw him pass and Brenn's voice carried over the din from somewhere to the left.
"The King's moving! Concentrate fire on the second tier! Clear his path!"
Thirty lances answered, their bolts converging on the switchback between the first and second tiers. Bodies flew apart. A section of fortified wall dissolved into slag. Mortarion hit the gap at full sprint and his scythe took the first champion across the waist before the man finished turning.
Three more fell in the arc's follow-through. A fourth raised a corroded halberd and Mortarion broke it with his forearm, then broke the man beneath it with a downward cut that split helm and skull together. He climbed through carnage, each swing deliberate, each step placement chosen a heartbeat before his boot landed. The household troops on the switchback died in clusters of three and four, too slow to track him, too fragile to survive contact.
Behind him, Darek's voice cut through the roar of lance-fire. "Line holds! Push the first tier! The Pale King's through!"
Good. Good soldiers. Better than this mountain deserves.
The second tier opened before him. Two siege-bores swivelled on grinding mechanisms, their crews scrambling to depress the barrels enough to target something climbing toward them. Too slow. Mortarion reached the nearest engine and buried his scythe's blade in its power coupling. The machine shrieked, convulsed, and detonated in a wave of superheated gas that would have stripped flesh from any human within twenty metres.
Mortarion walked through it. His skin reddened. Nothing more.
"Two engines left!" he rasped to no one, because there was no one alive on the second tier to hear him.
He killed the second crew before they could fire. The third engine he simply tore from its mounting with both hands and hurled down the mountainside, where it crashed through the coalition's reserve formation like a boulder through kindling.
The third tier waited. Eighty household champions in the heaviest armour the overlords could forge, arranged in a crescent around the path to the ridge. Beyond them, the five witch-kings stood in their lattice of sick light, and the air between them writhed with something that hurt to look at directly.
Mortarion planted his scythe and breathed. Slow. Deliberate. His lungs worked the poisoned air in their ancient rhythm while eighty men watched him with the eyes of soldiers who knew what stood before them.
"Move aside," he said. His voice carried without effort. The rasp filled the space between them like sand filling a wound. "Your masters are dead already. They just haven't fallen yet."
None of them moved. One, the largest, lifted his blade in salute. A gesture of respect from a man who intended to die well.
Fine.
Forty seconds later, Mortarion stood alone on the ridge path. Behind him, eighty bodies cooled in the toxic air. His scythe dripped something too dark to be blood. The warmth behind his eyes blazed like a forge-fire, closer than it had ever been, so bright it cast shadows inside his skull.
The five overlords waited.
They were ancient. Twisted. Their bodies bore the parasitic biology of centuries, flesh merged with things that had crawled from fissures in the mountain's heart. The lattice between them hummed with a frequency that made Mortarion's teeth ache. The eldest stood tallest, a creature called Vorath whose domain had held nine villages before the rebellion swept them free. His eyes were black from corner to corner and his mouth moved constantly, whispering something in a language older than Barbarus.
Mortarion stopped ten paces from them. His scythe rested across his shoulders.
"I offer you the same choice I've offered every patrol," he said. "Surrender. Or die."
Vorath's whispering stopped. The silence that replaced it was worse. Then the ancient overlord laughed, and the sound crawled across Mortarion's skin like something with legs.
"Necare taught us what you are, boy." The word boy landed like a slap. Only one creature had ever called him that. "Flesh of his flesh. Heir to his throne. A weapon that broke its leash and thinks itself free."
"I was never his."
"You were always his. And we have bargained for gifts that will unmake you." Vorath's black eyes widened, and the lattice between the five overlords blazed. "The things below the mountain heard our prayers. They showed us what lives inside you, Pale King. That golden warmth you treasure so dearly."
Mortarion's grip on the scythe tightened. His knuckles went white.
"They showed us how to cut it out."
The five overlords raised their hands in unison, and the fissures opened.
The first one died surprised.
Mortarion closed the distance in a single lunge, scythe sweeping upward from the guard position in an arc that caught the leftmost overlord beneath the collarbone. The blade, dark metal forged from a dead tyrant's own weaponry, passed through ward-strengthened flesh like it was remembering an old argument. The overlord's body separated along the diagonal, the two halves falling apart with a wet sound that the wind stole before it finished.
The lattice between the remaining four screamed. Threads of sick green light snapped and reformed, tightening around the survivors like a fist closing.
"One," Mortarion rasped. He set his feet and turned toward the next.
Vorath's mouth opened and what came out was not language. The sound hit Mortarion's eardrums like a physical blow, and with it came the lightning.
Four overlords raised their hands in unison. The Warp energy that crackled between their fingers was wrong in a way the lesser overlords' sorcery had never been. The colour shifted between violet and a shade that had no name, something that existed only in the spaces between sight. It coiled around their wrists in helix patterns, building for a heartbeat, two heartbeats.
Move. Now.
Mortarion threw himself at the nearest, a thin creature whose name he'd never learned. His scythe descended. The overlord's ward caught it, green fire flowering against dark metal. Mortarion pressed down, muscle against magic, and felt the ward buckle.
Then the other three released their strike.
The lightning did not hit his skin. It passed through it. Through the war-plate, through the leather, through the scarred muscle of his chest and back, and found the places inside him that had never been touched by poison or adapted against assault. His lungs. The deep tissue of his alveoli, the fine capillaries threading his hearts, the marrow of his spine.
Mortarion's legs folded.
His knee struck stone and the impact cracked the ridge beneath him. Blood rose in his throat, not from any wound he could see or feel on his surface, but from somewhere deeper. He coughed it onto the basalt in a spray of bright arterial red.
"There." Vorath's voice crawled with satisfaction. "You see, boy? Flesh resists flesh. But what we wield now passes through all resistance."
Get up. Mortarion's fingers whitened on the scythe's haft. His arms trembled. The corruption was inside him now, threading through his bloodstream like wire, eating at tissue his body had never needed to protect because nothing on Barbarus had ever reached it. Get up. Stand. You have stood through worse.
He tried. His legs refused. The muscles fired and the signals dissolved halfway, intercepted by the sorcery burning through his neural pathways.
The second overlord, the thin one whose ward he'd nearly broken, stepped forward and planted a boot on the flat of his scythe blade, pressing it to the stone.
"Necare sends his regards." The thin overlord's voice carried the particular pleasure of a messenger delivering news he has savoured in advance. "Your corpse will hang from the high keep. A lesson for any cattle who dream of rising above their station."
Mortarion's jaw clenched. Blood threaded between his teeth. Below, so far below it might have been another world, he could hear his army still fighting. Lance-fire. The clash of metal. Brenn's voice shouting orders. They were winning the lower tiers. They were winning everything except this.
I will not die on my knees before witch-kings. I will not.
He gripped the scythe and pulled. His arms obeyed. His spine straightened an inch, two inches. Vorath made a sound of irritation and the lattice between the four flared brighter. Fresh lightning lanced into Mortarion's chest.
The burning multiplied. His second heart stuttered. His vision greyed at the edges and the world narrowed to the taste of copper and the smell of his own blood cooking inside his veins.
And then the warmth answered.
It had been there his entire life. A pilot light in the dark of Necare's keep. A steady pulse on the nights the lessons left him broken and bleeding. A word. Brother. A promise he could not verify.
Now it blazed.
The golden fire erupted through his chest with a force that made the overlords' sorcery seem like candlelight before a furnace. It did not burn him. It burned through him, through the corruption threading his blood, through the Warp-lightning still crackling in his marrow, cauterizing and purifying in a single volcanic surge.
I am coming. The voice filled his skull. Familiar. Urgent. Close enough to touch. Hold. I am HERE.
"What...." Vorath's black eyes widened. The lattice between the four overlords flickered, destabilized by something it could not comprehend. "What is that light?"
Mortarion rose.
His legs found stone. His spine straightened. The thin overlord stumbled backward as the scythe tore free from beneath his boot with a shriek of metal against rock. Blood still ran from Mortarion's mouth, but his eyes burned gold, and the air around him shimmered with a heat that had nothing to do with Barbarus's poisoned atmosphere.
"Something you cannot cut out," Mortarion said. His voice came out raw, wrecked, and utterly certain. "Something that was never yours to touch."
Above them, higher than the ridge, higher than the toxic clouds, the sky split open.
Light poured through. Golden. Clean. A lance of radiance punching down through Barbarus's eternal overcast like a blade through rotted cloth. And inside that light, something descended. A shape. A ship. A sound that shook the mountain to its roots.
The warmth in Mortarion's chest roared its recognition, and for the first time in his life, the word brother was not a prayer.
It was an answer.
The drop pod struck like the fist of a god.
One moment the thin overlord stood above Mortarion with his blade raised, the killing arc already committed, muscle and sorcery aligned for the downward cut. The next moment the sky screamed, and a column of fire punched through Barbarus's eternal overcast, and six tonnes of ceramite-sheathed metal hit the overlord at terminal velocity.
The stone beneath them cratered. The shockwave rolled outward in a ring of displaced air and pulverized rock, catching the three surviving overlords and hurling them from their feet like leaves in a storm. Vorath tumbled end over end, his black eyes wide, the lattice between the remaining witch-kings snapping apart in a cascade of dying green sparks. The sound arrived a heartbeat after the impact, a thunderclap so deep it resonated in Mortarion's ribs and shook loose gravel from the ridge face above.
Silence fell.
Across the entire valley, both armies stopped. Eleven thousand rebels and four thousand coalition soldiers froze mid-swing, mid-thrust, mid-retreat, every face turning skyward. The drop pod sat in a crater of molten basalt where the thin overlord had stood, steam rising from its scorched hull in coils that the toxic wind tore apart.
Then the clouds opened further.
Hundreds of fire trails descended through the gap, each one a spear of golden light punching down through the poisoned atmosphere toward the coalition's rear lines. The trails carved bright scars across the perpetual murk, and with them came a sound Mortarion had never heard on Barbarus. Engine roar. Deep, resonant, the throaty thunder of drives built for void transit now screaming through atmosphere. And above the drop pods, above the fire trails, the clouds themselves peeled apart around something vast.
A hull. Dark metal and golden trim, kilometres long, descending through Barbarus's sky like a blade sliding from its sheath. The ship's running lights burned steady amber against the green-tinged murk, and its shadow fell across the eastern passes like nightfall arriving hours early.
That is a warship. That is a warship descending through a sky that kills everything it touches, and it is not dying.
The drop pod's doors blew outward on explosive bolts. Steam and pressure-loss vapour billowed from the interior. A boot struck the crater's edge. Then another.
The giant stepped out.
Taller than Mortarion. Broader. Armour the colour of old gold, scarred and battle-worn, fitted to a frame that made the overlords look like withered children. Brown skin beneath the helm's shadow, rich and warm even in Barbarus's corpse-light. Eyes that found Mortarion immediately across the smoking ruin of the ridge, eyes that were warm and certain and already grieving at the blood on Mortarion's lips.
I know that face.
The warmth in his chest detonated. Every vision. Every half-seen fragment on the worst nights in Necare's keep. The massive figure with brown skin and warm eyes who looked at him as if he were already loved. The face had lived behind his eyelids for years without a name, and now it stood ten metres away in golden armour, and Mortarion's scarred lungs seized in his chest.
His knees hit stone. Not from weakness. From something worse.
Brother. The word had never carried a face until now.
"Mortarion." The giant's voice rolled across the ridge like distant thunder given warmth. He crossed the crater in three strides, each footfall cracking the cooling basalt, and dropped to one knee before Mortarion with a motion that held no condescension. Eye to eye. "I'm sorry I'm late."
Mortarion's cracked lips parted. Blood threaded between his teeth. He wanted to speak. He wanted to say something worthy of this moment, something that matched the years of waiting and the warmth that had sustained him through every broken night in Necare's keep. What came out was a rasp.
"You crushed one of them with your ship."
The giant's mouth pulled into a grin. Broad. Genuine. The kind of expression that belonged on a different world than this one. "He was about to kill you. Seemed rude to let him finish."
"I had a plan."
"You were on your knees coughing blood."
"That was the plan."
A laugh. Short and startled, pulled from the giant's chest before he could stop it. His gauntleted hand closed on Mortarion's shoulder, massive fingers gripping with a gentleness that spoke of absolute control over strength that could crush starship bulkheads.
"My name is Aurelian. I am your brother." The warm eyes held his without flinching from the blood, the pallor, the red eyes set in dark hollows. "And I have been running toward you for longer than you know."
Aurelian's gauntlet pressed flat against Mortarion's sternum. The ceramite was warm, warmer than any metal had a right to be on Barbarus, and the heat sank through Mortarion's war-plate and leather and scarred skin until it found his blood.
"Deep," Aurelian said. His voice carried the focus of a man reading damage by touch. "They threaded it through your pulmonary capillaries. Warp-burn laced with a binding agent. Clever, for witch-kings working from instinct." His eyes flicked up, warm brown catching Barbarus's corpse-light and throwing it back as something cleaner. "I've burned worse out of wounds that had three days to set. This is minutes old. Hold still."
Golden light flooded through the contact point. Mortarion felt it enter his lungs like the first breath of air that had never existed on this world, clean and warm and carrying no cost. The corruption threading his veins, the wire-thin filaments of Warp-lightning that had been cooking his tissue from inside, dissolved. Each one came apart like frost meeting sunlight, and the pain that had dropped him went with it, pulling back from his marrow, his spine, his second heart, until his chest held nothing but the steady double-beat of both hearts firing in rhythm.
His legs steadied. His spine straightened the rest of the way. Mortarion breathed, slow and deliberate, and the air that filled his lungs was still poison, still Barbarus, but the damage beneath it was gone.
Aurelian gripped his forearm and pulled him fully upright. The size difference registered now, in the steady light rather than the chaos of impact. Aurelian stood taller by a head and broader by a hand-span across the shoulders, and his armour bore scars and impact-marks that spoke of wars fought elsewhere, on worlds Mortarion could not name.
"I wanted to arrive before the assault," Aurelian said. His jaw tightened. Frustration lived in the set of his mouth. "We hit a temporal eddy in the Warp. We lost six hours that should not have existed. I felt you fighting and I could not...." He stopped himself. Drew a breath. "I'm sorry."
Mortarion stared at him. Blood still stained his teeth. His cracked lips parted and the question came out raw, stripped of everything except the decades behind it.
"Are you the warmth?"
Aurelian's expression shifted. The frustration softened into something that hurt to look at directly.
"Yes."
"The light. In Necare's keep. When I was bleeding and nothing else...."
"Yes. That was me. A fragment of my psychic presence, threaded through the connection between us. I couldn't speak clearly, couldn't reach you fully across the distance, but I could...." He placed his hand over his own chest. "Keep a fire lit. So you'd know."
Mortarion's red eyes burned. His throat worked. The scythe hung at his side, forgotten, and for three heartbeats the sounds of battle below the ridge, the lance-fire and the shouting and the clash of metal, ceased to exist.
"You said brother."
"I am your brother." Aurelian said it without hesitation or qualification. "We share a father. There are eighteen others. You have never been alone, Mortarion. You were taken from us before we could protect you, and I have spent years crossing the galaxy to correct that."
Behind them, Vorath's voice rose in a shriek that carried sorcery in its harmonics. The two remaining overlords had reformed their lattice, weaker now with only three nodes instead of five, but the fissures in the stone were widening again. Something moved in the dark beneath the mountain's skin.
Mortarion turned toward the sound. His fingers closed on the scythe's haft and his breathing settled into its old rhythm, slow, controlled, each inhalation measured against the work ahead.
"Three left," he rasped. "They opened fissures. Something climbs out of them that conventional weapons cannot touch."
Aurelian drew a weapon from his back. A hammer, massive, its head crackling with bound lightning that threw blue-white arcs across the toxic air. He settled into a combat stance beside Mortarion, shoulder to shoulder, and the golden light around him intensified until the air itself seemed to recoil from his presence.
"Then we close the fissures." His grin returned. "Together. You take Vorath. He's the linchpin. Break him and the lattice dies."
"You know his name?"
"I've been watching Barbarus since my ship entered the system. Cortana mapped their power structure in the first hour." He hefted the hammer. "I know all their names. I know which ones can be redeemed and which ones have drunk too deep from the well beneath this world."
"None of them can be redeemed."
Aurelian glanced at him. Something measured lived in that look, an assessment made and accepted in a single heartbeat.
"Then none of them walk off this ridge."
Vorath's fissures cracked wider. The green light pouring from them thickened into shapes, limbs, mouths, the half-formed suggestions of things that existed more fully in whatever space the overlords had tapped. Mortarion felt the familiar hatred settle into his bones. Sorcery. Corruption. Power borrowed from something that would collect its debts in flesh.
Mortarion moved left. Aurelian moved right. The decision required no words, no signal, no hesitation. It lived in the space between them like something older than language, a coordination that belonged to shared blood rather than shared experience.
The third overlord, a hunched creature whose parasitic biology had fused his spine into a ridge of calcified bone and dark chitin, raised both hands and the fissure before him vomited green fire in a curtain meant to divide the ridge. Mortarion went through it. The flames licked his war-plate and died against skin that had breathed worse since infancy. His scythe came up in the stride's natural arc, dark metal catching the sick light and drinking it, and the overlord's ward shattered on contact like glass struck with a hammer.
"No," the overlord managed. One syllable. The last he would ever speak.
The scythe completed its arc. The blade passed through the junction of neck and shoulder with the ease of a tool meeting the purpose it was forged for. The overlord's head separated from his body and the body stood for two heartbeats longer, hands still raised, green fire still guttering from fingers that no longer received commands. Then it folded, and the fissure behind it sealed with a sound like wet stone grinding shut.
To his right, the fourth overlord hurled a lance of concentrated Warp-energy at Aurelian's chest. The bolt struck golden armour and splashed apart like water on heated metal. Aurelian did not slow. His hammer, Devil's Fist, came up in both hands, its head trailing blue-white lightning that threw stark shadows across the ridge, and he brought it down on the overlord's raised ward with the full weight of a Primarch behind the swing.
The ward held for a quarter-second. Then it didn't.
Devil's Fist drove through the overlord's defensive sorcery, through the parasitic armour plating fused to his torso, through the ribcage beneath, and into the stone of the ridge itself. The impact radiated outward in concentric rings of fractured basalt, ten metres of mountain face cracking apart like dry earth in drought. The overlord ceased to exist as a coherent form. What remained was pressed into the crater the hammer had carved, flattened beyond recognition.
Aurelian pulled the hammer free and turned toward Vorath.
The eldest overlord stood alone. His lattice was gone, its three remaining nodes destroyed in seconds. The fissures he had opened were closing, their contents dissolving without the sustained will to anchor them. His black eyes darted between the two Primarchs closing on him from either side, and for the first time in centuries the ancient witch-king's mouth stopped its constant whispering.
"You cannot kill what serves the deep," Vorath said. His voice shook. His hands rose, trembling, and the air between his palms thickened with every scrap of borrowed power his pacts could provide. "The things below will avenge me. They will find you. They will...."
"They already tried."
Vorath screamed. The sound carried sorcery in its harmonics, a killing note meant to rupture organs and shatter bone. It washed over Aurelian like wind over mountain stone.
The overlord poured everything into one final strike. Every fragment of borrowed power, every oath sworn in the dark beneath the mountain, every whispered promise from things that lived in the spaces between worlds. The bolt that left his hands was not green. It was the colour that had no name, the shade that existed between sight, and it struck Aurelian's chest with force enough to crater a city wall.
Aurelian did not move. The bolt struck his golden armour and something inside him answered it. A null-field bloomed outward, invisible to the eye but devastating to everything that drew breath from the Warp. Vorath's stolen power collapsed. The bolt unraveled. The ancient overlord staggered as centuries of borrowed strength drained from his cells in a single heartbeat, leaving him diminished, withered, mortal in a way he had not been since before the first village was built in his shadow.
"Mortarion." Aurelian stepped aside.
Mortarion understood. This kill belonged to him. This kill belonged to the two thousand names in the book at his belt, to the children carried off in the night, to Hesra's grey hair and Darek's failing liver and every shortened life this mountain had claimed under the overlords' reign.
He closed the distance in three strides.
Vorath looked up at him. Stripped of his sorcery, the ancient overlord was a wasted thing, all hollow bones and papery skin stretched over a frame that had forgotten how to sustain itself without stolen power. His black eyes had faded to a muddy brown. Human eyes.
"Boy...." Vorath whispered. The word came out weak. Pathetic. A ghost of Necare's voice in a dead man's throat.
"I am no one's boy." Mortarion's scythe rose. "I never was."
The blade fell.
Aurelian's hammer struck in the same heartbeat from the opposite side, a synchronized execution that required no coordination because it was written in their shared blood. Dark metal and crackling lightning met through Vorath's body at the same instant, and the eldest overlord of the eastern peaks ceased to exist in a spray of ash and silence.
Mortarion stood over the remains. His breathing was slow. Deliberate. His lungs worked their old rhythm, filtering the poison without thought, while something new settled into the space behind his ribs. He turned his head and found Aurelian beside him, hammer resting on one shoulder, brown eyes warm in the corpse-light of Barbarus's eternal overcast.
I have fought alone my entire life. The thought moved through him with the force of revelation. I have climbed alone. Bled alone. Carried names alone. And I never knew what it meant to have someone guard the side I couldn't watch.
His throat worked. The scythe's blade dripped dark ichor onto stone that was already forgetting the overlords had ever stood upon it.
"You fight well," Mortarion rasped. The words cost him something he could not name.
Aurelian's grin returned. Broad, genuine, infuriating in its warmth. "So do you, brother. So do you."
The valley floor took six hours to clear.
Mortarion had expected three. His soldiers knew the work of storming tiers and clearing fortified positions, and they moved with the grim efficiency of fighters who had spent fourteen months learning how to kill things stronger than themselves. But the coalition's household troops did not break. They did not flee. They fought with a frenzy that went beyond discipline, beyond loyalty, beyond even fear of their overlords. The pacts the witch-kings had sworn had seeped into the rank and file like poison into groundwater, and men who should have dropped their weapons when the sorcery died instead threw themselves forward with foam on their lips and something wrong behind their eyes.
"They're not surrendering," Darek reported from the second tier, his breath ragged through the communication horn. "We've offered twice. They come at us screaming. Some of them are biting."
"Binding corruption." Aurelian stood at the ridge's edge, hammer resting across his shoulders, watching the valley with eyes that tracked a dozen engagements simultaneously. "The pacts your overlords swore didn't just empower them. They sold their soldiers' wills in the exchange. Those men down there aren't choosing to fight. They can't choose anything."
Mortarion's jaw tightened. His fingers whitened on the scythe's haft. "Can you break it?"
"From here? No. The binding lives in their nervous systems. I'd need direct contact with each one, and there are four thousand of them." Aurelian's mouth set into a line. "The clean mercy is speed."
"Then we give them speed." Mortarion turned to the runner waiting three paces back. "Tell Brenn and Torva: no more surrender offers. Push hard. Finish it before sunset."
The runner vanished down the ridge path.
It was ugly work. Mortarion's soldiers had learned to hate their overlords, but they had never learned to hate the household troops, who were slaves in all but name, conscripts pulled from the same lowland villages and pressed into service under threat of worse. Killing men whose eyes rolled white and whose mouths frothed with someone else's rage cost something that clean victories against witch-kings never had.
Aurelian's forces took the burden where they could. The Aegis Guard advanced in disciplined wedges, their sealed armour proof against the toxic air, their weapons crackling with energies Mortarion's soldiers had never seen. They moved through the coalition's rear lines like a blade through gristle, methodical and devastating, and the bound soldiers died faster against them than against the cruder weapons of the rebellion.
And then there were the Palicoes.
Mortarion first noticed them at the junction between the first and second tiers, where thirty of his wounded lay propped against the switchback wall with blood-soaked breath-cloths and the resigned eyes of men waiting for death to find them. Small furred shapes moved among them, no taller than a child, with white medical pouches strapped across their bodies and voices that chirped in a language halfway between speech and song.
One of them, grey-furred with a notched ear, pressed a sealed pad against a soldier's gut wound. The pad hissed. The soldier's back arched. When the pad came away, the wound beneath was closed, the flesh knitting with a speed that made Mortarion's breath catch.
"What are those?" Hesra appeared at his elbow, her lance still smoking from its last discharge, her grey hair plastered to her skull with sweat and toxic condensation.
"I don't know."
Hesra watched a white-furred Palico splint a soldier's shattered forearm with quick, precise movements, chirping reassurance in its strange melodic voice. The soldier stared down at the creature with an expression Mortarion recognized. The same expression villagers had worn the first time golden light burned the poison from their air.
"They're saving my people," Hesra said. Her voice carried something fragile beneath its usual iron.
"They came with my brother."
Hesra's head turned. Her eyes found Aurelian on the ridge above, that massive golden figure surveying the battle with the calm of a man who had done this before on other worlds. She studied him for a long moment. Then she climbed the ridge path without asking permission.
Mortarion followed.
Hesra stopped three paces from Aurelian. She was a small woman, grey-haired and weathered, and beside the Primarch she looked like a sparrow before a cliff face. But her voice came out steady.
"Is this the something that's been watching him?"
Aurelian turned. His eyes moved from Hesra to Mortarion, and understanding crossed his face before Mortarion could frame an introduction. The warmth in his gaze deepened.
"Hesra, I assume." Aurelian inclined his head. "The woman who fed my brother when he came down from the mountain with nothing but bruises and a refusal to die."
She blinked. "He told you that?"
"He didn't need to. I know what my brother carries in his book. I know the names he reads every night. And I know which village his runners went to first when the rebellion began."
Hesra's jaw worked. She looked at Mortarion. Her eyes asked a question she couldn't articulate.
"My brother," Mortarion said. The word still tasted strange in his mouth, unfamiliar as clean air. "Aurelian. He came from beyond the stars."
"A brother." She turned back to Aurelian. Her chin lifted. "And those furred healers saving my people on the second tier?"
"Palicoes. Warriors and medics from my world. They volunteered for this." Aurelian's voice softened. "Your wounded will live. Every one my people can reach."
Her throat moved. She pressed both lips together until the trembling stopped.
"How long?" she asked.
"How long what?"
"How long have you been watching him? The golden light. The warmth he pretends he doesn't feel. How long?"
Aurelian's hand found Mortarion's shoulder. The weight of it settled there like an anchor.
"Since the beginning," he said. "Since Necare's keep. Since the first night he decided he would rather die free than live as an heir to cruelty."
Hesra looked between them. The Pale King of Barbarus and the golden giant from beyond the stars, standing shoulder to shoulder on a ridge where five witch-kings had died. Below, the last pockets of resistance collapsed as lance-fire echoed through the passes.
"Good," she said. Her voice cracked on the word. She pulled her breath-cloth up to hide whatever her face was doing. "Good. Because the mountain still has a summit, and I've watched him plan to climb it alone since the day this rebellion began."
"He won't." Aurelian's grip tightened on Mortarion's shoulder. "I promise you that."
Mortarion said nothing. His red eyes burned in their dark hollows and his cracked lips pressed together, and the warmth behind his sternum pulsed steady as a second heartbeat, and for the first time in his life the word alone felt like something that belonged to someone else.
Necare is watching this. The thought moved through him with cold clarity. From the highest peak, through whatever stolen sight his sorcery provides, the old witch-king is watching his weapon stand beside something he cannot comprehend. And his hands are trembling.
"The coalition is broken," Mortarion rasped. "Their soldiers will be dead by sunset. Their keeps are empty."
"And the summit?" Aurelian asked.
"Still waiting." Mortarion's gaze lifted toward the peaks lost in toxic cloud. "Still his."
"Ours," Aurelian corrected. Quiet. Certain.
Mortarion looked at him. The golden eyes held nothing but truth. No conditions. No inheritance demanded. Just presence, and the promise that the climb would never be solitary again.
"Ours," Mortarion repeated. The word rasped past his cracked lips like a blade drawn from a sheath it had outgrown.