The staging door opened onto Floor 2, and Petra didn’t break stride.
She stepped through without hesitation, Mikhail half a pace behind, and they spread into formation as if they’d done it a hundred times. Running on Floor 1 had been efficient, but the last few days with Yuki had sharpened them. They were almost automatic, moving in sync.
Yuki took the rear with Asha beside her, and Tess found herself center of the formation with four hundred kilograms of drill and capacitor banks on the mag-lev board floating two meters behind her, tracking her position on auto-follow with a repulsor hum so low it disappeared under the sound of boots on crystal.
“Clear ahead. Patrol passing junction B-4 in forty seconds. Move.” Bee’s voice in everyone’s earpiece.
They moved, and Floor 2 was definitely not Floor 1.
She’d known that intellectually. She’d been in the tunnels, felt the Aether, drilled through the floor material. But the surface corridors were something else. The ceiling rose three stories overhead into crystalline arches that scattered yellow light in slow, drifting refractions. The corridor was wide enough for Kade’s hauler with room on both sides. Floor 1 had felt like walking through a building. Floor 2 felt like walking through a cave.
The air sat heavier here. Warmer than staging, carrying that metallic taste she remembered from the tunnel breach. Aether saturation, not dangerous in the corridors, not like the raw density of the deep tunnels, but present and tangible on the back of her tongue.
“Two. Left junction.” Yuki’s hand went up behind Tess. “Twelve seconds.”
Two drones rounded the corner in tight formation. Faceted shells, angular wings, plasma emitters already cycling to fire. [ANALYZE] triggered on reflex, and data flooded her vision: crystal shell composition, repulsor frequency, weapon cycling rate, power routing to the plasma emitters.
Petra killed them both before the diagnostic finished rendering.
Two strokes, vibroblades humming at a frequency that settled into her jaw, and the drones dissolved into fragments that scattered across the floor and faded to nothing. Four seconds, maybe five, and Mikhail hadn’t even activated the MK-IX.
“Clear,” Petra said, and kept walking.
Tess stared at the spot where the drones had been. On Floor 1, fights had been events. Things you prepared for, positioned around, survived through coordination and effort. Petra had just killed two combat drones with less exertion than Tess spent on a cable splice.
But [ANALYZE] had caught their structure in the fraction of a second before they died. The data sat at the edge of her vision, persistent and detailed: coordinated targeting protocols, adaptive flight patterns, integrated sensor suites that shared positional data with nearby units. These drones fought as a network, not as individuals. The more of them in one place, the more dangerous they’d become.
She filed that away for later and kept moving.
The formation pressed forward through Floor 2’s corridor network. Bee threaded them between patrol cycles, calling turns and timing gaps through the earpieces: junction markers, patrol vectors, approach windows. The route zigzagged through monitored sections where Bee’s cameras tracked their progress, skirting the dead zones and high-traffic junctions. Corridors branched at every turn, some stretching into the distance beyond the reach of the yellow light. Each one a section of Floor 2 she’d never seen. The floor was four times the size of Floor 1, and from the inside, walking it, it felt bigger than that.
They passed a sensor node at a corridor junction, dead, with housing cracked and optical leads hanging loose, the crystal inside dark and cold. [ANALYZE] triggered without asking.
[Environmental Sensor Node — Offline]Last Error: Power LossIssue: Housing fracture (impact), optical leads severed (3), power feed corroded
She could fix that in fifteen minutes with a soldering iron and conductive tape. Bee would gain another sensor point. One more sliver of Floor 2 she could actually see.
Tess’s boots carried her past. The dead sensor fell behind them.
A relay housing sat at the next junction, mounted halfway up the wall. Status indicator dark, but casing intact. [ANALYZE] told her the crystal inside was functional, just disconnected from the power grid by a corroded lead she could replace in eight minutes. Another piece of Bee’s sensor network, waiting to be reconnected. Another problem she walked past without slowing.
Bee and Yuki had found a rhythm that Tess couldn’t stop watching. Bee called the wide picture: patrol routes, corridor coverage, timing gaps. Yuki felt the close picture: [TREMORSENSE] reading vibrations through the surrounding crystal within forty meters, tracking anything that moved by weight and speed.
“Patrol shifting,” Yuki said, flat and certain. “Your camera shows them heading north, but I’ve got a change. They’ve turned west.”
“I see them. Camera 2-31 catching the correction now.” A beat. “Marcus says the left corridor cuts six minutes off the route. There will be a contact, pair, possibly three, but even with the fight you’re saving time overall.”
Petra glanced back at the mag-lev and the capacitor banks humming around the drill, carrying enough stored energy to be a real problem if they were hit.
“We take the fight,” Yuki said. “Board behind Mikhail.”
The formation adjusted without slowing. Mikhail stepped wide, putting himself between the predicted contact and the mag-lev.
Forty seconds later, three drones swept around a junction in a staggered line. Yuki’s rifle cracked once, and the lead drone shattered as [RICOCHET SHOT] sent the round off the crystal wall at an angle that shouldn’t have worked. Burning shards tore through the second drone’s wing assembly. Petra caught the third mid-bank. A stray bolt flared off the MK-IX across Mikhail’s chest, and the corridor was clear.
“Nice shot,” Asha said from behind Tess.
“Average shot,” Yuki said. “Nice shot uses two walls.”
They moved on. The team reformed without verbal cues. Petra and Mikhail back in front, Yuki scanning both directions before the debris finished dissolving, Asha’s hands checking her belt pouches by touch. Nobody celebrated. They processed kills the way Tess processed diagnostics: note it, move on, stay ready for the next one.
The corridors changed as they pushed deeper into Section 9.
It came in stages. The manufactured panels and plasteel surfaces of the inner sections thinned, then disappeared. Crystal growth replaced them, not over the walls but instead of them. Structural ribs of raw crystal arched overhead where ceiling tiles should have been, and the floor was still flat and walkable, but the seams between fabricated surface and living stone were visible everywhere. The crystal seemed to take over.
Geometry had shifted too. The inner sections followed clean right angles, manufactured intersections built by something that thought in grids. Out here, the corridors curved. They followed the crystal’s natural growth instead of fighting it. The dungeon had stopped maintaining its original architecture and let the crystal decide where walls went.
The yellow light deepened around them. Bioluminescent veins pulsed with a slower rhythm, unhurried, as though they’d been running for a very long time with nowhere to be. The air thickened. Not the raw geyser blast she’d taken in the tunnels, but enough to feel it on her skin, a warmth that had nothing to do with temperature.
“Beautiful,” Asha said. She was scanning the crystal growth the way she scanned wounds: with clinical interest and no fear.
“It’s dying,” Tess said. “The outer sections can’t sustain themselves.”
“Dying things can be beautiful.”
Tess couldn’t argue with that.
They passed a utility terminal recessed into a crystal-choked alcove. The housing was intact, but crystal growth had crept across the access panel like frost on glass, the display dark. [ANALYZE] fired.
[Utility Terminal — Degraded]Status: Standby (Low Power)Data Relay: FunctionalDisplay: Offline (power insufficient)Input: Blocked (crystal encroachment)
The terminal was alive. Pulling a trickle of power from whatever feed still ran through the crystal substrate. If she cleared the growth off the panel, rerouted power from the nearby junction, and replaced the display driver, she could access it. Get a map of the floor, or whatever else might be in there.
She walked past it.
A power junction with leads corroded green. A camera mount with an intact housing, but the feed cable consumed by crystal growth. A ventilation grill pushing warm, Aether-dense air into the corridor, its filter choked with particulate she could clean in ten minutes. [ANALYZE] diagnosed all three without being asked, gave her fixes and time estimates she couldn’t use, and went quiet again. Like a tool she’d forgotten how to put down.
Nine broken or offline systems in thirty-five minutes. Nine things she could fix. Nine things that would make Bee’s coverage stronger, the floor more readable, and their position more secure. Nine problems she had to walk past because her hands were needed six meters below a crystal floor for one job that mattered more than all of them combined.
“Section 9 junction ahead,” Bee said. “The room is thirty meters down the right corridor. Currently clear.”
“Currently,” Yuki said.
“That qualifier was intentional.”
They turned right. The growth thickened on both sides, narrowing the corridor by half a meter. Ahead was the opening Bee had found for them: eight meters across, thick crystal walls, a single way in.
Yuki stopped, palm flat on the floor.
“Big group. Eight, moving fast, southern corridor.” Her eyes closed. “Something heavier behind them.”
“Ground construct,” Bee confirmed. “Camera 2-19. Eight drones in escort formation around a heavy ground unit. Heading for the junction behind you.”
“Two minutes,” Yuki said. “Maybe less.”
Petra looked at the room ahead. Then, at the junction behind them.
“We fight in the corridor, they pin us against the mag-lev. We make the room, we hold the chokepoint.” She was already moving. “Go. Now.”
They ran.
Tess shoved the mag-lev’s follow speed to maximum, and the board surged forward, repulsors keening against the floor. Four hundred kilos of drill and capacitor banks sailed ahead of her, and she sprinted to keep up. Asha matched her stride for stride.
They poured into the room. Yuki spun and dropped to one knee in the doorway, rifle up, covering both corridor approaches. Petra flanked the left. Mikhail planted himself center of the entrance, the MK-IX flaring to life across his body—blue energy shimmering over his arms, his chest, his legs like heat haze wrapped around a silhouette.
Tess hauled the mag-lev to the back wall and killed its momentum. The board settled with a lurch. The capacitor banks strained against their straps and held, all four intact.
The drones arrived thirty seconds later.
Plasma fire lit the corridor outside. The first volley found Mikhail—three bolts, then four, then five—the MK-IX flaring white across his body at each impact, crackling webs of energy dispersing across the barrier and fading clean. Yuki’s rifle cracked twice from her position, and two drones fell out of formation, faceted hulls shattering on the floor. Petra moved past Mikhail, and her vibroblades caught two more in the open, precise strokes that left dissolving fragments spinning in her wake.
Four down, four to go, and the construct was still coming.
The remaining drones split. Two went high, firing from near the ceiling. Two went low, banking around the doorframe, trying to get inside. Mikhail pivoted to catch the ceiling fire, and one of the low drones slipped past him, past Petra—into the room.
It came in fast, plasma emitter cycling, heading straight for the mag-lev and the capacitor banks.
Asha’s hand went to Tess’s hip and came away with the CPP-12. Three shots, each one finding its target as if she’d been shooting her whole life. Wing, repulsor housing, crystal core. The drone exploded into shards two meters short of the power banks.
Asha handed the pistol back, grip-first, without looking.
“Been delving a long time,” she said. Her eyes were already on the opening.
The ground construct hit the doorway.
It was bigger than the one from the debriefing report. Heavy crystal plating, reinforced along the leading edge, the sort of thing built to anchor a corridor and draw fire while drones worked the flanks. [ANALYZE] fired and diagnostic data spilled across her vision:
·········································DISRUPTION PLATFORM — HEAVY VARIANTStatus: ActiveComposition: Crystal-reinforced compositeWeakness: Articulation joints (reduced plating)Mobility: Track-based — low speed, high massNote: Electromagnetic dampening field — 3 meters·········································
“Joints!” Tess called. “The armor’s thinner where it articulates. And it’s running a dampening field, stay outside three meters.”
Yuki adjusted. Her next shot hit the construct’s left track joint, and it lurched, one tread seizing against the doorframe. But the construct ground forward despite the damage, the dampening field making the air shimmer around its hull. Yuki’s follow-up shot went wide, visibly bending around the field distortion.
Asha moved before Tess saw the vial leave her hand. A small glass tube spinning end over end, trailing amber liquid. It shattered against the construct’s upper plating, and the contents spread across its sensor cluster in a hissing, smoking line. The construct hesitated. Its weapon tracking stuttered, searching for targets it could no longer lock onto.
“Strong solvent,” Asha said. “Eats sensor lenses.”
Petra didn’t waste the opening. Her vibroblades went back onto her hips, and the plasma blade emitters came out. The ignition sound was distinct: a sharp crack followed by a sustained hiss that Tess felt more than heard. Purple plasma matching the bolts from the drones arced from both emitters, throwing hard shadows across the crystal walls.
She went through the blind construct as if it were practice. One cut took the weapon mount off its hull. A second split the upper plating along the articulation seam Tess had called out. The third was almost casual, a diagonal stroke that carved through the track assembly and into the floor beneath it. The construct came apart in three pieces and dissolved before they finished separating.
Four seconds of plasma blade. Maybe five. Petra killed the emitters and holstered them, vibroblades back in her hands before the afterimage faded from Tess’s vision. Twenty-five seconds of charge left, give or take. She spent them like she had plenty.
But Mikhail was bleeding. A bolt had gotten through while the construct’s dampening field disrupted his barrier. Left thigh, the greave absorbing most of it—not all.
Asha was on him before he finished turning around. She worked the way Tess worked on a junction box: no hesitation, no wasted motion, every action flowing into the next. Hypo into the thigh above the burn. [RAPID MEND] activating in a flash. Her off-hand peeled back the greave and pressed a dermal patch over the wound while the skill was still working. A vial came off her belt, cracked against the dressing, and the contents soaked through. Mikhail’s jaw tightened.
“Coagulant accelerator. Burns for a minute, full mobility in two.”
“Burns is accurate,” Mikhail said through his teeth.
But she was already gone. She caught Petra coming through the doorway, found a thin cut on her forearm from a drone fragment, applied a dermal patch with two fingers and steady pressure. Yuki looked and shook her head. Nothing to fix for her.
She’d diagnosed three people, treated two injuries, and used four different tools in less time than it took Tess to splice a cable. Asha stepped back into her central position, shifted some things from her pack to her belt, then sighed. A healer who’d spent a decade learning exactly how fast people broke and exactly how fast she could put them back together.
“Clear for now,” Bee said. “No immediate contacts. That engagement drew attention across the section. You have a window.”
***
Tess checked each capacitor bank. Charge indicators are green across the board. No physical damage, no shifted connections, no cracks in the housings from the sprint. Four hundred kilos of equipment had traveled thirty-eight minutes through hostile corridors and arrived intact. The closest call had been a plasma bolt four feet wide of its mark.
She knelt beside the mag-lev and started unstrapping the BFD-3600.
The drill came free of its case and attached power leads from each capacitor bank connected to the external input port. It was wired in a parallel feed with automatic failover. She pulled her toolkit from where it was strapped and spread it open on the floor. Multi-tool, plasma torch, solvent, probes, connectors, tape. Everything she’d need for whatever was down there.
“Bee. Am I on target?”
“Two hand-widths to your left. FCN-2B is directly below.”
She adjusted. The emitter settled flat against the crystal floor.
Petra and Mikhail flanked the entrance, vibroblades and shield both ready. Yuki had her perch on a crystal outcrop inside the room, rifle braced on stone, watching two corridors at once. Asha stood centrally, between the fighters and the drill, where she could reach anyone in the room within seconds.
Four people holding a room in a section of the dungeon that was more stone than structure, more living thing than architecture, so that Tess could drill six meters down and fix the machine underneath.
“Thirty minutes,” Tess said. “Maybe less.”
Petra nodded.
Yuki racked a round. “Clock’s running.”
Tess activated Resonance Bore Mode. The BFD’s beam punched into the floor, and sound filled the room, a grinding harmonic roar that rippled through the room like a physical force. Dust erupted from the contact point and drifted upward in a sparkling cloud. The drill’s frequency shifted as it searched for resonance in the first material layer, found it, and cut.
The sound poured through the entrance and down both corridors. It carried through the crystal walls, through the floor substrate, into the living structure of Section 9.
Everything within earshot knew exactly where they were.
“They’re coming,” Bee said.