The corridor took two hundred and six steps to walk its forty meters. Yeda counted them twice, out and back again, so the number had no excuse either time.
Inside the east wing, distance kept opinions of its own about arithmetic. Doorways stood where the map insisted on walls, and the map corrected itself with a liar's smoothness each time he caught it wrong.
Through the exterior windows the yard sat forty meters away, morning-lit and reasonable. It stayed forty meters away no matter how deep the party walked, like a painting the building refreshed to keep up appearances.
"State the known risks," Vasa said, watching the map redraw across her thin party screen.
"The wing is bigger inside than outside," Nox said, "and my map updates behind the truth instead of ahead of it. Everything else in here is unknown, which I'm stating too."
The architecture had stopped pretending to be a school one floor in. Classroom doors ran in ranks, but their frames stood tall and narrow, carved with a script that made his eyes slide off it.
Every handle sat at the height of something that had never been a student. Yeda reached one on her toes and took her hand back without trying it.
The first room they cleared held desks built for the same missing tenants, high-backed, slotted for tools no student carried. A bowl of fused glass beads sat on one desk, arranged mid-task, abandoned mid-reality.
Whoever the Merge had taken this building from, it had taken them without notice too. The thought filed itself under useful humility and stayed there for later.
Three stories of it climbed around a central well of standing dark. Bridges crossed the well at angles no school board had ever approved. The breathing he had heard at the threshold turned out to be air moving through the structure in slow tides.
"Somebody else's building," Kendra said, stone easing along her arms, "and the Merge sewed it into ours."
"Sewed it badly," Vasa said, tapping the seam where brick became a grey material with grain, "and the stitching shows. That means edges, and edges mean rules."
He gave the wing the respect a new market deserved, which meant systems before speed. Vasa marked every intersection with a thumbprint of frost, Yeda kept the step counts, Kendra tested doors, and Appraise read whatever sat still long enough.
The order of march stayed fixed, stone at the front, counting behind it, frost in reserve. In a building that rewrote itself, discipline was the only wall they could carry with them.
The first hour bought them the whole shape of the ground floor. Nests of shredded paper packed three classrooms, warm, recently used, with tunnels chewed through the connecting walls at knee height.
Whatever nested there had population behind it, and population meant a food chain. He filed the thought beside the tall door handles and kept the party moving in survey order.
The second hour of the exploration bought them the vents, at a price. A grille shivered ahead of Yeda on the mezzanine, and a stream of hand-sized creatures poured out of it like spilled coins with legs.
[ Skitterling: Rank F. Weak seam: underbelly. Threat: swarm only. ]
The swarm met frost first, then stone, then the pipe working like a metronome again. He killed his share with the knife's flat more than its edge, and the survivors reversed into the walls with their dead abandoned.
"They retreated on a signal," Vasa said afterward, frost still hissing on the tiles, "and nothing that small retreats in formation without something larger holding the whistle."
"I know," he said, cutting a Skitterling core the size of a tooth free, "so we haven't met the landlord yet. Keep mapping."
Method got its reward in rooms before the third hour was out. Behind a seized door on the second floor they found working plumbing, humming quietly to itself across realities.
A deep stone trough sat under fed pipes, holding water clean enough for Appraise to call it water without footnotes. Kendra drank first on her own insistence, waited ten minutes as taster, and the wing gained its first genuine asset.
Two doors along from the water room they found a real workshop. Benches with clamps lined the walls under racks of hand tools in the same wrong-handed design. Drawers held stock metal that had crossed realities to sit in a school which no longer made anything.
Yeda stood in the workshop door a beat longer than the sweep needed. He logged the pause the way he logged everything about her, as inventory the party had not spent yet.
"There's a grinder," she said, mostly to the pipe in her hands, and closed the door behind them with something like reluctance.
"The workshop stays sealed until the wing is ours," he said, marking it, "and then it's yours first, before anyone barters for bench time."
Kendra found the third floor's secret by failing to open a door. Her report came down the stairwell short and level, a door with no handle at all, warm to the touch.
The System dressed it in one line as they gathered on the landing.
[ Territory heart: sealed. Claimant authority required. ]
"The landlord's floor," Nox said, reading the heavy grain of the door, "and it opens for whoever holds a claim, which nobody holds yet. We map around it."
They found the nest proper an hour later, and the nest was the wing's real lesson. A double classroom on the second floor had become a nursery, pods of woven insulation stacked in warm rows, tended by things that made the Skitterlings look like samples.
[ Brood Warder: Rank E-. Weak seam: joint gaps. Function: nursery guard. ]
Six Warders moved through the pod rows with a caretaker's economy, and the party watched from a vent-adjacent doorway without breathing loudly. He counted pods until the count stopped being useful and started being a warning.
One Warder paused at a pod and fed something wet through the weave with surprising delicacy. Inside the insulation, small shapes shifted toward the food, and the room's warmth suddenly explained its own purpose.
Drag marks ran through the nursery dust, wide as a doorway, pressed deep. Something had moved through its own nursery with enough weight to polish the floor, and none of the six Warders matched the marks.
"We don't spend here," he said, easing the door back, "because nurseries mean a mother, and mothers are commander arithmetic. Not at our current numbers."
Their second pass along the same corridors quietly changed the map again. Forty minutes later Yeda's count broke against a nursery that had moved, pods, Warders, and warmth relocated two rooms east as though the wing had shrugged.
"The nest walks," Vasa said, checking her frost marks twice, "on a cycle or on a trigger. That detail is worth more than every route we've drawn."
"It's the detail that kills anyone who copies the map without buying the timing," Nox said, and marked the movement pattern in a layer of the map he did not intend to sell.
Two more passes gave the cycle a shape, roughly ninety minutes between shrugs. The nursery drifted around the second floor like weather with a schedule, and the schedule was now his alone.
Food came out of packs at the halfway rest, and the arithmetic came out with it. Three days of stock had become two while nobody was watching, split four ways now instead of five, and the wing's water only solved the cheaper half of hunger.
"The map pays for food," he said, watching the party eat, "or the map is decoration. Remember that when I start selling it."
He built the tiers while they rested, three products from one survey. Ava's version would carry food corridors without nest adjacency, the gym's would carry hunting routes with honest exits, and the fortress's would carry one evacuation line purchased in medical stock.
A Warder patrol caught them at the mezzanine junction an hour before his legs wanted it. Four came out of the well's dark on a bridge above, dropping in staggered pairs while the swarm boiled out of two grilles in support.
"Known risks are standing in front of you," he said, knife coming up, "and Warders die at the joint gaps. Kendra takes the drop point, frost owns the grilles, Yeda works the seams I open."
The fight was the wing's entrance exam, and the party sat it without a proctor. Kendra caught the first Warder's landing on planted stone, feeding its stagger sideways, where his knife found the hip gap and left it dying on the count.
Frost sealed one grille outright, then laid a rink under the second until Skitterlings arrived as sliding cargo. Yeda took the second Warder's knee joint from behind while it fixed on Kendra, and the pipe finished the arithmetic at the neck gap.
The third and fourth learned in the middle of the fight, which E-minus apparently allowed. They paired on him at once, gaps guarded, working him toward the well rail with a coordination that deserved respect and did not get to keep it.
He gave ground until the rail touched his back, because borrowed geometry worked on monsters too. When the left one committed, he dropped flat, and its partner's lunge spent itself on air while Kendra's shoulder arrived like scheduled weather.
The rail put the first one into the well, and the drop audited it on the way down. The last Warder died between Yeda's pipe and his knife, its joint gaps opened in an order the party had never rehearsed yet executed anyway.
The exam had graded him too, in the margins where exams always did. A claw had reopened the shoulder wound along its scab line, and his knees carried the memory of the drop-flat like a bruise with interest.
[ Enemies defeated: 4 Brood Warders, 23 Skitterlings. ]
[ EXP +1,200. (5,700 total.) ]
[ Level 11 reached. 5 assignable points available. ]
He put two into Endurance, two into Perception, and one into a column he had never fed, Stamina. The wing had been taxing something underneath his strength all day, and the System kept a ledger line for it.
Warmth settled through him while the party stripped the cores from the Warders. Four E-minus cores joined the pouch, dense little facts, and the count of what integration would someday be worth kept compounding.
"Map status," he said, and Vasa turned her screen so the party could see the architecture of their day.
Three floors, ninety-one rooms, eleven vent runs, two water sources, one workshop, one sealed heart. Nest cycle marked in a private layer, patrol rhythms noted, choke points flagged, every route walked twice.
[ East wing survey: complete. ]
[ Route map compiled. First-survey authority: Nox. ]
"That is the first thing we own that everyone else needs," he said, tapping the screen, "and Ava needs food corridors. The gym needs glory routes with exits."
"The fortress needs an evacuation line that doesn't cross a nursery," he added, "and all three of them will pay in different currencies."
"You're going to sell the same building three times," Vasa said, and the audit in her voice had something like approval under it.
"I'm going to sell three different buildings," he said, "and keep the fourth one, because the timing layer stays ours. A map without the nest cycle is a coupon for a funeral."
They made camp in the water room, the one door in the wing with plumbing behind it and a single approach. Kendra took first watch, and the wing breathed around them in its slow foreign tides.
Vasa boiled water in shifts with a frost trick run backward, and Yeda stripped the pipe's tape to rewrap it dry. Nobody talked much, which was its own report. The party had learned the wing's grammar in a day, and learning cost quiet.
He was pricing map tiers against core values when every screen in the party lit at once. The text came in the System's heaviest weight, and under it the floor carried horn notes from three directions, every territory answering the same memo.
[ School-wide territorial adjudication has begun. ]
[ All surviving factions: claim and hold a wing within 12 hours. ]
[ Unclaimed factions will be classified as prey. ]
[ Current claimants: North Kennel. East Warren. South Pit. West Burrow. ]
Across the room Vasa's breath frosted the air as she read it twice. Somewhere west, a fortress full of desks and children had just been handed a deadline that rotations could not meet.
"The fortress," she said, and did not finish the sentence, because the sentence finished itself.
"They hold a wing already, they just never called it one," he said, "and the admin block is a claim if Owen files it. Whether he can hold it tonight is his arithmetic, not ours."
"Prey," Kendra said from the door, flat as the stone on her arms.
"Twelve hours," Nox said, and the map of the wing turned in his head from asset into address, "and the good news is we're standing in the only unclaimed wing that's already been surveyed."
"And the bad news," Vasa said, watching him.
"The seal upstairs wants a claimant with authority," he said, "and authority in this building has always meant one thing. We're going to meet the Broodmother before the clock does."
He opened the private layer of the map and set the nest cycle ticking beside the adjudication timer. Ninety-minute weather, a twelve-hour storm, and one warm door at the top of it all waiting for somebody to become a landlord.