The first three drones came in fast and died faster.
Yuki’s rifle cracked twice from her perch on the crystal outcrop. [RICOCHET SHOT] sent the first round off the doorframe and through two drones in a line, burning fragments scattering across the corridor floor. Petra caught the third one banking through the entrance with a single vibroblade stroke that left nothing but dissolving shards.
It took eight seconds or so.
The BFD-3600 hadn’t paused. Its grinding harmonic roar filled the room like something solid, rattling dust off the crystal walls and vibrating through Tess’s bones where she knelt beside it. The emitter beam punched into the floor, and the contact point glowed white-hot at the edges, a column of sparkling dust rising around it like a slow chimney.
One meter down. Five to go.
Tess checked the power feeds. Four capacitor banks wired in parallel, charge indicators all green, drain rate steady. The BFD was pulling hard but within the range she’d calculated. At this rate, she had power for thirty-five minutes of sustained cutting. She needed thirty. Maybe less if the material got more cooperative deeper down.
“Clear,” Petra said from the entrance. The fragments were gone.
Silence settled back in, or what passed for silence with the BFD turning crystal into dust. The drill’s frequency had found its first resonance in the floor material and locked in, the pitch dropping to something almost musical—an ugly, grinding kind of music that went through the walls and the floor, into the living crystal of Section 9 like an invitation to everything within earshot.
“Hey, Bee.” Yuki hadn’t moved from her perch. Rifle still up, eyes on the corridor. “We’re holed up in a room protecting someone important from an army. Sound familiar?”
A beat of silence on the comms.
“OH.” Bee’s voice came through warm with recognition. “Season 11. The Siege of Flores Station. Commander Hale barricades the medical wing while NORA-1 reroutes the reactor.”
“While the entire station is coming down around them,” Yuki finished.
“That is a very good parallel. Except NORA-1 had a plasma lance and six marines.”
“How many seasons does that ridiculous show have?” Petra asked without looking away from the corridor.
“They are on twenty-nine.”
“Twenty-nine.”
“The narrative complexity increases significantly after season twelve. I can provide a viewing guide if—”
“Please don’t.”
Mikhail, flanking the entrance opposite Petra, said nothing, but the corner of his mouth twitched.
“Second group,” Bee said. “Five contacts. Southern approach. Formation is tighter than the first.”
The humor evaporated as they came in at speed. Five drones in a wedge formation, faceted hulls catching the yellow light, plasma emitters already cycling bright. The first bolts hit Mikhail center mass and the MK-IX flared to life across his entire body, a shimmering skin of blue energy that rippled outward from each impact point. The barrier absorbed everything cleanly. Every bolt dispersed in crackling webs that raced across his chest, his shoulders, down his arms, fading as fast as they formed. Three bolts, four, five, six. He didn’t flinch. The field reformed between hits without visible strain.
Yuki picked the rear two out of formation. Two shots, one ricocheted off the ceiling, that fragmented into the second drone’s wing. Petra moved past Mikhail and caught a third mid-bank. Mikhail walked into a fourth with his vibroblade up, a bolt splashing off his left shoulder as he brought the blade through in a single stroke that sent the drone spinning into the wall where it shattered.
The fifth got through.
It came in low and fast, angling under the combat, emitter locked on the capacitor banks behind Tess.
Asha was already moving. She hit the nearest bank with her hip and shoulder together, shoving the entire mag-lev sideways. The plasma bolt punched into the spot where it had been, leaving a blackened scar on the crystal.
Yuki’s follow-up shot caught it from behind, and it came apart in a shower of crystal and light.
“Batteries are fine,” Tess said. She’d checked before the words were out. All four banks reading green, no housing cracks or shifted connectors.
The drill hadn’t stopped. The emitter beam had carved through the first meter and a half of floor material, and the layers showed as [ANALYZE] broke them down, cascading diagnostic data at the edge of her vision.
The top meter was standard dungeon composite. Manufactured and uniform, like a fresh coat of paint—clean crystal grain in orderly rows, reinforced at regular intervals with structural ribs that were clearly engineered.
Below that, the composition changed. The grain ran at different angles, and the structural ribs were thicker. [ANALYZE] flagged it as repair material. Not original construction but a response to damage. The dungeon had been patched something here a long time ago, and the patch had calcified into a compound harder than the original floor.
Six meters of dungeon floor, and the drill was cutting through a timeline.
“How’s my girl doing?” Asha asked. She was crouched beside Mikhail, hands on a plasma graze along his arm. [RAPID MEND] flashed, brief and efficient, and the damaged skin knit together in a visible ripple.
“Drill’s fine. Meter and a half down.”
“Meant you.”
“Also fine.”
“Good.”
Tess watched them. Petra stood in the entrance as if she’d been born to hold a doorway, vibroblades loose and ready. Yuki had one palm flat on the stone, feeling for vibrations, rifle braced. Mikhail rolled his shoulders and settled back into position without a word.
Four people, and every one of them had stats—power, speed, perception—numbers that translated directly into how hard they hit, how fast they moved, and how much punishment they could absorb. Asha was Level 11. Her [RAPID MEND] worked because her class fed it power, optimized her tool use, and turned medical knowledge into something that bordered on impossible.
Tess had TECH 9 and all 10s. She couldn’t bring much to this fight, so she focused on drilling.
She could see every system on this floor in clear diagnostic resolution and fix things nobody else could find, let alone repair. She could interface with dungeon infrastructure that had been sealed for decades and coax it back to life.
But she couldn’t take a plasma bolt like Mikhail, couldn’t swing a vibroblade like Petra, couldn’t run faster or heal from a wound in seconds. If something got past her team and reached the drill, she had a pistol and whatever Asha’s reflexes could manage.
Level 9. Ninety-one percent of the way to something she didn’t understand and couldn’t predict.
The drill shifted pitch and kicked back slightly as it hit a deeper layer with a different resonance. It adapted, found the new frequency, and the grinding settled into a lower register that Tess felt in her sternum.
“Third group incoming. Eight contacts.” Bee’s voice had gone flat, operational. “And one heavy signature. Bigger than the corridor unit.”
Petra’s vibroblades went back onto her hips. The plasma blade emitters came out.
“Save it,” Yuki said.
“I’ll save it when the drill’s done.” Petra ignited both emitters. The crack of plasma ignition cut through the drill noise, followed by the sustained hiss that Tess felt more than heard. Purple arcs burst from the handles as she turned.
The drones hit first. Eight in two staggered groups of four, plasma fire pouring through the entrance in overlapping volleys that strobed the crystal walls purple. Mikhail stepped into the doorway, and the bolts found him. The MK-IX lit up at every impact point, each bolt dispersing in branching threads of spent energy. He held his ground with his vibroblade forward; the field rippling under sustained fire but reforming between hits. Yuki’s rifle cracked three times in quick succession, each shot precise, each ricochet calculated. Three drones fell in the first six seconds.
Petra moved through the remaining five like a current through wire. The plasma blades flickered purple across the crystal walls, afterimages burning in Tess’s vision. A drone banked left, and she split it in two. Another dove for the floor, and she caught it rising, both blades crossing through its hull. A pivot, a third stroke that caught one banking for the ceiling. Crystal fragments rained down and dissolved before they hit the floor.
Then the ground construct filled the doorway.
It ground forward on heavy tracks, reinforced plating angled across a hull wide enough to block the entrance. Heavier than the corridor unit. Wider, too. Two weapon mounts sat on articulated arms flanking its upper hull — rotary-barrel plasma guns, six barrels each, already spinning with a rising mechanical whine that cut through the drill noise. The electromagnetic dampening field shimmered around it in visible distortion, bending the light and the air. [ANALYZE] fired:
·········································DISRUPTION PLATFORM — SIEGE VARIANTStatus: ActiveComposition: Crystal-reinforced composite (heavy)Weakness: Ventral platingMobility: Track-based — very low speed, extreme massNote: Electromagnetic dampening field — 4 metersNote: Dual rotary plasma weapons — high rate of fireNote: Kinetic ram capability·········································
“Underneath!” Tess called. “Belly plating’s thinner and it doesn’t like heat. Dampening field is four meters, wider than the last one. And those guns—”
The rotary weapons opened fire.
The sound was enormous. Not the discrete staccato of drone emitters but a continuous roar, both mounts cycling plasma bolts at a rate that turned individual shots into solid streams. The entrance lit up in strobing purple. Crystal walls on both sides of the doorway cracked and spalled under the barrage, fragments spraying inward.
Mikhail walked into it.
The MK-IX blazed like a second skin on fire. Bolts hammered him from every angle—the field pulsing without pause, discharges racing across its surface so fast the arcs overlapped. He took three steps forward into the stream, vibroblade angled at his side, and the field held. Every bolt dispersed on contact, the energy bleeding off in webs of light that wreathed him from head to boots. The stabilization between hits was getting tight, but it held.
Yuki’s shot hit the construct’s upper plating and deflected, the round bending visibly through the field distortion. “Confirmed. Rifles are out inside the dampening field.”
The construct ground forward, tracks scraping crystal, driving Mikhail back a step. The dampening field washed over him, and the MK-IX stuttered, the body-envelope flickering in and out as two fields collided. For a half-second Mikhail was exposed, and a bolt caught his ribs through the gap in his chest plate.
Petra went low.
She dropped under the nearest rotary mount as it tracked toward her, and the barrels chewed a line of plasma across the ground where she’d been standing. The emitters screamed as she drove them into the underside of the construct and dragged them through as if she were cutting tinfoil. Crystal composite split and peeled back in molten lines, and the construct lurched, one track seizing. She pulled the blades free, rolled clear, and came up on the other side for a second pass. The cut went deep. The construct’s internal structure glowed through the wound for a moment before the rotary weapons spun down and the whole thing shuddered and began dissolving.
The emitters went dark. Petra holstered them, and the vibroblades were back in her hands before the construct finished falling apart.
The fight had lasted less than thirty seconds, and Asha was already working. Mikhail had a fresh plasma graze along his ribs where the construct’s dampening field had disrupted his barrier. Her hands moved the way Tess’s moved on a junction box. Hypo, [RAPID MEND], then dermal patch.
“Ribs?”
“Burned.”
“You’ll live.” She was across the room. “Petra.”
“I’m fine.”
“Your left forearm is bleeding. Hold still.”
A thin line of blood from a crystal fragment Petra hadn’t noticed. Asha had a dermal patch on it before Petra finished looking down.
“Fifteen minutes,” Tess said. “Halfway. Material’s getting more uniform deeper down. Might shave time off the back half.”
“Shave it,” Petra said, taking a drink from a canteen.
***
The fourth wave came twelve minutes later, and it came from two directions.
“Six from the north,” Bee said. “Four from the southeast. Different patrol groups, converging.”
“They’re learning,” Yuki said. She shifted position to cover both approaches. “First groups were patrols that wandered into range. These are coordinated.”
“I can corroborate that. Drones within acoustic range of the drill site are actively moving toward you rather than following patrol routes.”
Mikhail took the entrance. Yuki called positions through [TREMORSENSE], and Bee filled in camera data. The northern group came first and Mikhail stepped into the corridor to meet them, keeping the fight away from the room. Three bolts, six, eight — each one caught by the MK-IX, the energy dissipating in quick flashes along his silhouette. He cut a drone out of the air between impacts. The barrier was still holding, but the shimmer across his skin was taking a fraction longer to resettle between hits now.
Two more shots from Yuki dropped more drones. “I’m running low!”
The southeastern group followed thirty seconds later, banking around the junction while Mikhail was still engaged in the north corridor. Two drones slipped past him into the room.
Asha approached and held out her hand toward Yuki without looking. “Gun.”
Yuki unclipped a sidearm from her thigh holster and tossed it. Asha caught it left-handed.
Then she held out her other hand.
“I know you got more. Need two to make this trick work.”
Yuki’s eyebrow arched, but she didn’t question it. A second pistol appeared from somewhere behind her back and landed in Asha’s palm.
What happened next, Tess could hardly believe.
Asha moved out of her central position with both pistols up and firing. Each shot was placed precisely. She tracked both drones at once, each arm working on its own as she danced, each weapon finding its target with a precision that had nothing to do with class skills or stat bonuses. This was muscle memory burned into bone. Years of it. Decades, even.
The first drone took three shots to its repulsor housing and spun into the wall. The second veered hard, evasive, and Asha tracked it without rushing. Two shots and it came apart two meters from the ceiling.
A third drone they hadn’t called came through behind the second group. Asha put two rounds into it without turning her head. Her body rotated, pistol arm extending, and the shots found the drone’s center mass like she had a targeting reticle wired into her skull.
The room went quiet except for the drill.
Asha lowered both pistols. Checked the room once—left to right—then handed the guns back to Yuki, grip-first. She winced and slapped a dermal patch on her shoulder with a pained smile.
“Guess I still got it,” she said into the silence, then noticed everyone staring at her. “What? Told you. Long time delving.”
Nobody had a response. Yuki took her pistols back with an expression somewhere between professional respect and recalculating everything she thought she knew about the woman.
Tess went back to the drill. She was two-thirds through now. The layers were ancient here, the grain loose and disorganized. The foundational layer, the bedrock on which everything above had been built. The drill’s resonance had found a deep harmonic in this material, and the cutting was faster now, the beam adapting to stone that was old but structurally tired.
She checked the power feed. Banks one and two sat at forty percent, bank three at fifty-two, bank four untouched as the failover reserve. She had more than enough.
Then she noticed the drone.
It was at the far edge of the corridor, visible at the limit of the yellow light. A single combat drone, hovering at the junction. It wasn’t doing anything at all.
It seemed as if it was watching.
“Bee.” Tess kept her voice low. “Corridor junction, northeast. Single drone.”
“I see it. It has been stationary for approximately ninety seconds. It is not broadcasting patrol data to nearby units.”
“What’s it doing?”
“Observing. I have no other explanation.”
The drone held position for another ten seconds. Then it banked smoothly, turned, and disappeared down the corridor.
Tess stared at the empty junction. The drones on Floor 2 fought as a network, sharing data and coordinating formations.
Something was paying attention.
She filed it and turned back to the drill. Five meters down. One to go.
***
The fifth wave was the worst.
“Multiple contacts, both approaches,” Bee said. “Southern corridor: six drones, one ground construct. Northern corridor: five drones.”
Eleven drones and a construct, converging on the junction from both directions at once.
“That construct reaches the junction, its guns have a straight line through the entrance. We saw it with the last one,” Yuki said. She didn’t need to finish the thought. The capacitor banks were six meters from the door.
Petra was already moving. “I’ll meet it in the corridor. Keep it back.” No plasma blade. She’d spent what she had on the siege construct. Whatever charge remained in those emitters, it wasn’t enough for another sustained engagement. Vibroblades would have to do.
“North group comes to me,” Mikhail said. He filled the doorway, the MK-IX shimmering to life around him. Yuki repositioned on her perch to cover both angles.
It was the right call and the wrong call at the same time. Petra in the south corridor with vibroblades against a construct and six drones for thirty seconds minimum. But a construct pouring rotary fire through the entrance into a room full of charged capacitor banks was worse. She had to draw the fire away.
Asha stood center, between the fighters and the drill.
The northern group hit first, plasma fire in a sustained barrage that lit the corridor in strobing purple. Mikhail took the bolts standing, the field catching each impact, but it wavered now—slower to reform, the shimmer uneven where it wrapped his arms and chest. Yuki fired past him between impacts. One drone, two, three. The remaining pair split wide and tried to angle past him through the doorway.
The south corridor erupted a moment later.
Petra activated the MK-VII shield, and the barrier shimmered to life around her—a full envelope, same as the MK-IX, but the MK-VII was built for kinetic impacts, not energy fire. A plasma bolt hit her shoulder, and the field caught it wrong; the energy scattered unevenly instead of dispersing cleanly. A second bolt punched straight through, and Petra was in motion. When you couldn’t block, you closed the distance.
The larger construct rolled toward the junction, heavy tracks on crystal. Twin rotary mounts sat on its upper hull, barrels spinning up with that same rising whine. They opened fire, and plasma bolts streamed down the corridor in a continuous pour, light hammering off the walls. Drones used the construct as cover, firing over its hull. Petra cut two from the air in crossing strokes, rolled under a burst from the rotary weapons that chewed the wall above her, ducked a drone bolt that singed the top of her ear, and drove a vibroblade into the nearest weapon mount. The barrels screamed and seized around the blade, one gun silenced. But the construct kept driving forward on its tracks, the remaining mount tracking toward her, shoving her back toward the entrance.
Yuki solved the northern stragglers with two shots and pivoted south. Her rifle cracked once, and a drone behind the construct exploded. Mikhail moved to the south angle of the doorway, putting himself between the construct’s remaining gun and the room, the MK-IX absorbing stray bolts before they reached the entrance.
Thirty seconds alone against the construct, the remaining rotary mount tracking her every move, plasma bolts stitching the walls as she circled. She found the joint between armor plates, the articulation gap, the same weakness she’d exploited previously. Both vibroblades went in together. She twisted. The construct split along the seam, the rotary weapon spinning down as crystal halves fell apart before they hit the floor.
The remaining drones scattered, but Yuki picked them off easily.
Petra stepped back into the room with a burn across her shoulder and a cut above her right eye from a crystal fragment that made it through the overtaxed MK-VII. She was breathing hard.
Asha was on her in two steps.
“That was stupid.”
“It worked.”
“Stupid and effective can be the same.” Dermal patch on the shoulder burns; antiseptic swab on the cut. None of it was gentle.
Bee’s voice, lighter than it had been: “I am relaying your status to the Guild Hall. Sara and Amos are present. They are…upset no one informed them of the timetable, but they wanted me to convey that they are, and I quote directly, ‘impressed are our initiative.’”
“Tell them to keep being impressed for about ten more minutes,” Tess said.
The drill was at five and a half meters. The material at this depth was the oldest she’d seen. Loose crystal, barely held together, the foundational layer where the dungeon met whatever had been here before the dungeon existed. The resonance was almost easy now, the BFD’s beam cutting through tired stone that offered less resistance than anything above it.
Banks one and two were in the red, bank three at eighteen percent, bank four drawing now as the failover kicked in. Tight, but enough.
“Careful,” Yuki said. Her palm pressed flat against the stone. “Something below. Deep.”
Tess looked at the drill, at the five and a half meters of hole it had carved through the floor, and the last half-meter of ancient crystal between her and whatever waited underneath.
Then the BFD broke through.
The emitter beam punched into open space, and the drill’s pitch changed instantly, a sharp whine as the resonance lost its target material. Tess killed the power.
For half a second, nothing happened.
Then raw Aether hit like a wall.
It came up through the hole in a column of shimmering teal, refracting the yellow light into prismatic bands that strobed across the ceiling. The metallic tang she remembered from the first tunnel breach, except ten times stronger. The blast caught her in the chest and knocked her backward from the drill. She hit the floor, skidded, and the room went bright and hazy as unfiltered Aether washed across her skin and burned in her sinuses.
Idiot. She should have expected this. Of course, she should have expected this. She’d been in the Floor 2 tunnels, felt the Aether density, taken the five-second exposure that put her down for two hours. Of course, the substructure was pressurized. Of course breaching it would blow a column of compressed Aether into an enclosed room full of people.
“Down!” Asha barked.
The geyser lasted about eight seconds. The room was large enough that the Aether dispersed before it could build to dangerous concentrations, spreading in a wave of shimmering warmth that rolled across the ceiling and dissipated against the crystal walls. Petra turned her face and pulled her collar over her mouth. Mikhail shielded his eyes. Yuki closed her eyes and breathed shallow, controlled. Asha dropped to a crouch and pressed her sleeve against her face, reaching for her belt.
Then it was over. The pressure equalized, and the geyser died to a faint upwelling of warm air rising from the hole.
“Mild exposure, all of you,” Asha said, scanning the room. “Breathe shallow next few minutes, don’t touch your eyes. Got [PURGE] if anyone needs it.”
“Fine,” Petra said between coughs.
“Fine,” Mikhail said.
“Fine,” Yuki said.
Tess rolled onto her hands and knees. Her skin prickled and her eyes watered. But the exposure had been seconds, not sustained, and the room’s volume had done the rest. She should have warned them. Should have rigged a barrier, a vent, something.
She crawled to the edge of the hole and looked down.
Six meters below, bathed in slow amber light, was a chamber. Larger than she’d expected. Crystalline walls pulsed with deep rhythms that weren’t the tunnels and weren’t the corridors. Something older, sealed down here for a very long time.
And in the center, rising from the floor like a monument, was FCN-2B.
It was massive. Four times the size of FCN-2A. Full-sized skill crystals studded the housing in dark clusters, each one a module waiting to be brought online. The console was recessed into a platform of dense crystal that [ANALYZE] immediately began cataloging: power routing, data feeds, sensor arrays, control interfaces, architecture so dense that the diagnostic data stacked in layers she’d need minutes to parse.
This was not a sensor node. FCN-2A had been eyes and ears. This was the brain. The system that would give Bee control of the gargantuan Floor 2.
“Bee,” Tess said. “I can see it.”
“I know.” Bee’s voice was quiet. “The sensors are picking it up clearly.”
Tess sat back on the edge of the hole and looked up at her team. Petra was wiping blood from above her eye with the back of her hand, and Mikhail leaned against the doorframe beside her, shield dimmed to standby, favoring his burned ribs. Yuki already had her rifle up again, watching the corridor. Asha stood in the middle of the room with her arms crossed, breathing steadily.
Battered and tired, every one of them, and alive because they believed this mattered.
“I’m going down,” Tess said. “Wait. This isn’t a maintenance hatch, can’t you come down with me?”
Petra met her eyes. “Someone’s got to help get you back up.”
Asha unfolded her arms. “We’ll be here and in one piece. Go fix the brain.”
Tess lowered herself into the hole, found a handhold in the crystal wall, and started climbing down. Above her, the sound of Yuki racking a round.
Below her, FCN-2B waited.