"Okay," Xavier whispered, very slowly stepping back from the threshold. "New plan. We go quietly. We go around the edges. We do not, under any circumstances, wake up an army of skeletons that has clearly been waiting its entire undead existence for something to finally wake up for."
"Agreed," Bruce whispered back, easing through the doorway on light feet that seemed almost comically careful given how much armor he was wearing. "Hug the wall. There's a passage on the far side, I can see torchlight past it."
They moved as a tight, silent unit, pressed close to the chamber's outer wall, giving the endless rows of standing skeletons as wide a berth as the room allowed. Up close, the sheer scale of the place was almost worse than not being able to see the far wall at all — alcove after alcove after alcove, stretching in neat, uniform rows into darkness, some still bearing scraps of ancient banners or rusted shields, an entire buried army interred standing up, as if whoever sealed this place had fully expected to need them again someday.
"How many do you think are actually in here?" Stephan whispered, eyes tracking the rows as they passed.
"I would like to not think about that number," Bruce whispered back. "Keep moving."
Xavier let his gaze drift across the nearest alcoves as they crept past, unable to fully stop himself, and noticed something he hadn't expected to — small, careful details worked into each skeleton's preserved armor and posture that suggested individual identity rather than mass-produced uniformity. One still gripped a small, tarnished locket in one bony hand, fingers curled around it even after six centuries of standing perfectly still. Another wore a scarf, rotted nearly to nothing, tied with a care that felt distinctly, uncomfortably personal.
'These weren't just soldiers,' he thought, but didn't say out loud. Someone had cared enough, once, to bury them holding the things that had mattered to them. That didn't feel like the work of something purely monstrous, whatever else might be waiting deeper in.
It was, for a solid two minutes, actually working — no movement from the alcoves, no sound beyond their own careful footsteps and shallow breathing. Halfway along the wall, Stephan's trailing boot caught the edge of a low stone plinth jutting out from beneath one of the alcoves, and an old, rust-eaten shield balanced against it tipped, slow and terrible, toward the floor.
All three of them froze.
Stephan's hand shot out and caught it a bare inch above the stone, fingers closing around the rim with a desperation that made his whole arm shake, and for one long, unbearable heartbeat nobody breathed at all, waiting for the crash that hadn't happened, for the ripple of waking bone that surely had to follow.
Nothing moved. The nearest skeletons stood exactly as still as they had a moment before, hollow sockets facing forward, undisturbed.
Stephan eased the shield back against the plinth with the delicate, overexaggerated care of a man defusing something far more dangerous than an old piece of rusted metal, and let out a breath that shook audibly on the way out. "Okay," he mouthed, barely a whisper at all. "That one's on me. Sorry."
"Watch your feet," Bruce mouthed back, pressing a hand briefly to his own chest like he was checking his heart hadn't actually stopped.
"The shield was aggressively positioned," Stephan whispered, in his own defense.
"The shield did not do anything. The shield was a shield."
Xavier let the exchange wash past him without comment, too busy scanning the rows ahead for the passage Bruce had spotted, torchlight flickering somewhere past the endless ranks of the standing dead. They pressed on, slower now, each footstep tested before it landed, Stephan visibly recalibrating his own sense of where his limbs were in space with every step.
The passage grew close enough to make out properly a gap in the far wall, torchlight spilling from somewhere beyond it. For a moment it actually felt, absurdly, like they might make it across the whole chamber without incident, three careful shapes moving unnoticed through an army that had slept through six hundred years of undisturbed silence and might, with a little more luck, sleep through a little longer.
"Almost there," Bruce breathed, more to himself than either of them.
Xavier let himself feel something close to hope, his shoulders dropping a fraction from the tight, defensive line they'd held since the door first opened. It was, in hindsight, exactly the kind of thought that tended to invite trouble the moment a person actually let themselves have it.
Then something small, black, and many-legged dropped from the ceiling directly onto Bruce's shoulder.
Bruce did not handle it gracefully. He yelped — a genuine, high, undignified yelp that echoed off the stone with catastrophic clarity — and flailed backward directly into Stephan, who, catching sight of the spider now scuttling frantically across Bruce's collar, let out a shout of his own that was, if anything, even louder.
The spider, for what it was worth, was tiny. Perfectly ordinary. Almost certainly more frightened of them than they were of it, given how fast it flung itself off Bruce's shoulder and vanished into a crack in the stone the moment it hit open air. In any other room, in any other moment, it would have been nothing. This was not any other room. None of that mattered anymore.
"...What did my favorite character used to say? Oh, right. Damnation!" Xavier said into the ringing silence that followed, watching a slow, rattling wave of motion ripple outward through the nearest alcoves — bone fingers twitching, ancient joints creaking awake, hundreds of hollow eye sockets turning, almost lazily, toward the source of all that noise.
"That was a spider," Bruce said, mortified, already scrambling upright. "It was a normal spider. I have fought actual demons..."
"Not the time!" Stephan was already backing toward the passage they'd been aiming for, Ember drawn, voice climbing toward genuine panic. "Not the time, we need to move, right now, immediately!"
The first skeleton stepped free of its alcove with a dry, papery rattle, and then a second, and then it was no longer a matter of counting individual movements at all — the whole vast room shuddering to life at once, an entire buried army rising in near-perfect unison after six hundred years of patient, undisturbed silence, drawn by nothing more dramatic than one very startled bard-of-a-hammer-wielder and a spider smaller than a coin.
"RUN," Xavier shouted, all pretense of stealth thoroughly, catastrophically abandoned, and the three of them bolted for the far passage as the Bonevault's entire skeletal garrison came rattling, clattering, shrieking to life behind them in a rising, deafening wave of noise.
They didn't make it far. The first wave of skeletons closed the gap behind them, bony hands grasping at cloaks and coat-tails, and Xavier had just enough time to register how many there actually were. Dozens, at minimum, with hundreds more still pouring out of their alcoves behind that first wave, before the noise and the crush of bodies became less a battle and more a genuine, overwhelming flood.
"Bruce!" Stephan's voice cracked with something closer to real fear than Xavier had heard from him in a long time. "BRUCE, WHERE-"
Xavier spun just in time to see a dozen skeletal hands close around Bruce's arms and coat, hauling him backward into the churning mass of bone with a speed that left no time to reach him. Bruce's shout cut off almost instantly as the crowd of animated dead swallowed him whole and dragged him deeper into the vault's darkness.
"BRUCE!"
Xavier lunged after him and was immediately, forcibly turned back by a wall of grasping arms he had no hope of cutting through fast enough, flame and fury doing nothing against sheer, overwhelming numbers. He got one clean strike in — a wide arc of fire that cleared a body-length of space directly in front of him — and it bought him exactly long enough to see Bruce still clutching his satchel strap with white-knuckled determination even as the crowd dragged him under, before the gap closed again and Bruce was gone entirely, swallowed into churning bone and shadow.
Stephan hauled him bodily toward the passage instead, both of them half-fighting, half-fleeing through a nightmare of rattling bone and grasping fingers, Bruce's voice already lost somewhere behind them in the deafening roar of an army six hundred years overdue for a fight.
They broke free into the passage beyond more by luck than skill, skeletal hands scraping uselessly off Xavier's coat as he wrenched free of the last grasping reach, and didn't stop running until the noise behind them finally, gradually, began to thin into something survivable. Xavier turned back once, chest heaving, searching the churning dark for any sign of Bruce at all, and found nothing but bone and shadow and the fading echo of a fight neither of them had wanted to run from.
"We have to go back for him," he said, the moment he could form words at all.
"We will." Stephan's voice was steadier than his face looked — blood and dust streaked across one cheek. "We just can't do it by charging straight into an entire army. We need a plan first. He'd tell us the exact same thing."
Xavier hated, more than almost anything else that had happened today, that Stephan was right. He forced himself to breathe, slow and deliberate, the way Elrick had drilled into all three of them more times than he could count.
Panic solves nothing; only clarity does.
He made himself think instead of feel, if only for a moment. Bruce was smart. Bruce was resourceful. Bruce had talked his way out of worse spots than this with nothing but a satchel full of odd tools and an infuriating amount of patience. That had to count for something, even here, even against an army of the dead led by something six hundred years old.
"Okay," he said finally, voice steadier than he felt. "Plan. We need a plan."
"Now you're talking," Stephan said, and for the first time since the chase had ended, something like determination crept back into his exhausted, dust-streaked face.
Xavier looked back down the passage one last time, toward the darkness that had swallowed Bruce whole, and made himself a quiet, private promise that he had no intention of breaking, whatever it ended up costing either of them to keep it.