The stairwell didn't open.
Lex hit the release mechanism with the flat of his hand and the door stayed exactly where it was — sealed, the indicator light beside it burning a steady red that hadn't been there moments before.
"Building's locked down," he said.
His voice was still flat. Still the voice from six lives of fleeing rather than the careful composure he wore in front of strangers. He hit the mechanism again. Nothing changed.
Behind them the corridor had become something Muhan didn't have a word for yet.
The Dreadwalker teams had broken formation completely now, scattered across the width of the hallway. Some carried swords — eternal steel blades that caught the strip lighting in long cold flashes as they swung, the weapons of Hollows who trusted close range over distance. Others carried Cyber Eternium Guns, their barrels forged from the same dense black material as the building itself, each discharge producing a concentrated flash of white-blue energy and a sound less like gunfire and more like something tearing.
None of it was working in any pattern Muhan could identify.
Somewhere to the left a man was screaming a name over and over — not words anymore, just the shape of a name worn down into pure sound — and the screaming didn't stop, it just got further away as whoever was making it was dragged or carried or fled in a direction Muhan couldn't track.
The creature reached the Marked woman who had kept her hand against her weapon too long.
Muhan saw it happen.
The claw came down across her shoulder and didn't stop at the shoulder — it continued through, the angle wrong for a glancing strike, and her arm separated from the rest of her in a motion that took less than a second and produced a sound that Muhan's mind would carry for the rest of however long he lived. Not a scream. A wet collapsing exhale, the sound of a body registering catastrophic damage faster than the mind could organize pain into a scream, and then she was on the ground and the creature's second claw finished what the first one started and the sound stopped entirely.
Blood hit the eternal steel wall in a wide dark arc.
It was already running down the seams between panels when Muhan looked away.
A Dreadwalker beside her raised his Cyber Eternium Gun and fired three times in rapid succession, the discharge lighting the corridor in pulses of white-blue, each shot striking the creature's flank and producing a flash of contact that should have meant something. The creature didn't slow. It turned toward him and a sword-bearer from the second team intercepted, the eternal steel blade catching one of the creature's claws mid-strike, the impact producing a shower of sparks and a sound like a bell struck wrong.
The blade held for one second.
Then it didn't.
The air had changed. Underneath the ozone smell of weapons discharge there was something else now — copper, thick, arriving in waves with each fresh casualty, the specific smell of an enclosed space being asked to hold more death than its filtration systems were built to process.
"This way," Lex said.
He was already moving — not toward the main corridor where the fight continued, but along the wall, toward a service junction Muhan hadn't clocked until Lex's hand found the seam in the steel and pulled. It opened. Narrow. Designed for maintenance access rather than evacuation, barely wide enough for one person at a time.
Muhan went through first.
Lex followed and pulled the panel shut behind them, and the sound of the corridor — the gunfire, the swords, the voices, the specific wet finality of things ending — dropped to a muffled register that was somehow worse for being distant rather than gone.
---
The maintenance corridor ran parallel to the main hallway.
The smell reached Muhan before the first body did — copper and something underneath it, organic and wrong, the smell of the eternal steel's recycled air carrying particles it had never been designed to carry. His shoe caught on something tacky two steps into the corridor and he looked down and the floor wasn't reflecting the emergency lighting the way it should. It was matte. Dark. Pooled in the corridor's low points and tracked outward in long smeared trails where something had been dragged or had dragged itself.
The first body was at the second junction.
A teacher — older, the instructor's identification badge still clipped to a uniform that had been opened from collar to sternum, not cut cleanly but torn, the edges of the wound ragged in a way that made Muhan's mind supply details he didn't want and couldn't stop. Flies hadn't found it yet. That detail registered and Muhan filed it and didn't examine why his mind had chosen that detail specifically to fixate on.
He kept walking through blood that was no longer just on the floor.
It was on the walls at hip height in places, sprayed there in patterns that told their own story if you were the kind of person who read patterns, and Muhan was exactly that kind of person and he read it anyway even though reading it cost him something each time.
The second body was a student.
Younger than Muhan. The screaming somewhere behind them in the main corridor had stopped being one voice and become several, overlapping, none of the words distinguishable anymore, just a continuous wall of sound that the maintenance corridor's narrow walls compressed and amplified rather than dampened.
Five.
Six — a Marked pair, found together at the base of the wall they had apparently tried to climb, their fingers still hooked into the seam between two steel panels eighteen inches above where their bodies had finally stopped. A sword lay between them, its blade cracked clean through near the hilt.
Seven.
The eighth body was the Marked from the Hovercraft.
Muhan recognized him before his mind finished processing why and then his mind finished processing why all at once — the wound that had opened him from sternum to hip, the specific glistening wrongness of what should have stayed inside a body now resting outside it, the smell so concentrated at this specific point in the corridor that Muhan's throat closed involuntarily and he had to force the next breath through it.
His limbs were the pale that Thorax had described.
Muhan looked at the nearest hand — close enough that he could see the skin had already lost its color entirely, gone the specific bloodless white of something the building's systems would soon log as a fatality rather than a person — and he understood that if he touched it now, in this corridor, with the screaming still going somewhere behind him, it would come apart in his hand the way Thorax said it would.
He didn't touch it.
He kept moving.
Ten.
He had counted ten and his shoes were wet with what the corridor had become and the screaming hadn't stopped and somewhere underneath all of it, distant and getting more distant, gunfire and the ring of steel continued in irregular bursts that told him people were still alive back there.
For now.
---
The comm channel activated without warning.
A voice — male, controlled in the specific way voices are controlled when the person speaking has trained extensively for situations exactly like this one and is drawing on every hour of that training simultaneously:
*"—confirming Level 3 breach, multiple hostiles, requesting immediate Patriarch-level response, civilian casualties extensive, repeat, civilian casualties extensive, I have a visual on the secondary—"*
The voice continued, delivering coordinates, a designation Muhan didn't recognize, the specific cadence of someone narrating a tactical situation for whoever was receiving the transmission on the other end. Lex had gone still beside him, listening, his jaw set at the angle Muhan had learned meant he was processing something faster than his face was willing to show.
*"—the secondary hostile is moving independent of the primary, I'm tracking it through Sublevel access, it's not engaging anything in its path, it's moving like it's looking for—"*
The voice stopped.
Not faded. Not cut by static or distance.
Stopped — the specific silence of a transmission that had simply ended mid-word, the comm channel holding open static where a sentence should have continued, and in that static, for one fraction of a second before the channel cut entirely, a wet sound that lasted less than a second and told Muhan everything he needed to know about what had just happened to whoever had been speaking.
Muhan's chest tightened further.
Lex didn't move.
The channel went dead.
---
They found the next junction in silence.
The maintenance corridor opened into a wider space — a transitional chamber connecting several of the building's service routes, large enough that the AVC's designers had clearly intended it for equipment storage rather than passage, the kind of space with enough clearance that something far larger than a person could move through it without difficulty.
Muhan felt the wrongness before he saw it.
The temperature had dropped. Not the eternal steel's baseline cold — something additional, something arriving from a specific direction, the way cold arrives when a door has been opened somewhere nearby and the air beyond it doesn't match the air on this side.
Lex's hand found his arm.
Stop.
Muhan stopped.
The chamber's far end opened into shadow that the emergency lighting didn't reach, and in that shadow something was moving with a quality of motion that didn't match anything Muhan had catalogued so far. Not the Wilderbeast's low patient advance. Something with more articulation — limbs that bent in places limbs weren't supposed to bend, a silhouette that resolved into curved black horns rising from a skull wreathed in matted fur, white in patches and black in others, the pattern not camouflage but something closer to disease, like the creature's coat had been stripped and regrown wrong in sections.
A tail moved separately from the rest of it.
Coiled. Restless. Tracking something the rest of the body wasn't tracking, sweeping through the dark with a deliberateness that suggested it had its own purpose independent of whatever the creature's head and claws were doing.
Muhan didn't move.
He had heard one word for it.
*It's that thing.*
A Hollow's voice, somewhere behind them in the main corridor, screaming it before the scream became something else entirely and then became nothing. Muhan didn't know what the words meant. He didn't know if anyone alive in this building knew what they meant. The creature in front of him had no rank classification he could access, no documented entry in anything Thorax or the silver-haired instructor had taught, just a name spoken once by someone who hadn't survived long enough to explain it.
The creature's head turned.
Toward them.
Its eyes found the chamber's dim light and held it in a way that wasn't reflection — something more active, something that suggested the eyes were producing their own faint luminescence from somewhere deep behind the sockets, a quality Muhan had not seen in the Wilderbeast's red gaze and didn't want to examine closely enough to understand why it was different.
It hadn't seen them yet.
Or it had, and was deciding.
Lex's grip on his arm tightened by a fraction.
The creature took one step into the wider pool of emergency light, and the proportions resolved fully — too tall through the shoulders, the legs bent at an angle that suggested speed rather than the Wilderbeast's grinding patience, the claws at the end of each limb curved and overlapping in a way that looked less like a weapon and more like the natural conclusion of something that had been built for exactly one purpose.
It opened its mouth.
No sound came out.
That was the wrong part. That was the part that sat in Muhan's chest beside everything else the corridor had already put there — the specific horror of a mouth opening wide enough to suggest a scream and producing instead a silence so complete it felt deliberate, like the creature had decided sound wasn't necessary for what it intended to do next.
Lex pulled him backward.
Slow. Careful. The same controlled retreat Muhan had used in the dead forest, weight shifting before the foot moved, the specific economy of someone trying to put distance between themselves and something without producing the kind of motion that drew attention.
The creature's head tracked the movement.
Then it took a second step forward, faster than the first, and somewhere beyond it — further down whatever corridor it had emerged from — another scream started and didn't get the chance to finish, and Muhan understood with the specific cold clarity that had carried him through everything since his regression that this creature was no longer deciding.
It had decided.