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Every rune on the Warden key ignited at once in Guy’s hand. The red-bronze metal screamed without sound. In answer, the plate beside the hearth blazed, light racing through its carved lines so fast the wall around it smoked.

The smell hit a heartbeat later– hot copper, scorched cedar, and old blood warmed under stone. Guy’s hand jerked back half an inch before he forced it steady again.

Outside, Arrhythmia’s Wards flared hard enough to hammer the cabin with light. Shadows slammed across the floor– branches, window crossbars, our bodies stretched too long and too thin– while the glass rattled in its frames and the containment circle spat sparks that smelled like lightning striking bone. The blue and white grids collapsed inward, then snapped back open in a cage pattern around Knox, each line vibrating so fast it blurred. My false composition bucked between my hands, suddenly eager, suddenly wrong, tugging toward the white glare outside like it recognized a voice I could not hear.

Carrick shouted, “ISOLATE THE STATION. NOW.”

Guy jammed the red-bronze key into the plate beside the hearth.

Knox jerked like something had roared directly through his bones.

I opened my Alicorn Sight. What I saw was not another test tapping at the boundary.

The full response lattice unfolded against the Wards, vast and precise and awful. It did not batter them. It arranged itself over them. Layer by layer. Answer by answer. Every stolen lesson blooming into structure until I could see the shape of the thing that had been learning about us and from us.

It had Knox’s Hellborn leash in it. Guy’s Wards. The echo of Lou and Sully. The sampled edges of my own Magic, refracted back at me in a pattern I had never chosen but still recognized.

My skin went cold beneath the places where the light touched it. For one horrible second, I felt the insult of it more than the danger. It had taken pieces of us and arranged them like they belonged to it.

The lesson was over, and I understood with sudden, sick clarity that we had not been the only ones preparing a countertrap.

Something had come to take the exam.

Hell wasn’t asking questions anymore.

It had decided it knew the answer.

16

Guy turned the Warden key.

Left.

Right.

Right.

CLUNK!

The main Ward connection died.

Carrick’s projection snapped out mid-shout. Ginnie’s calculations vanished with him, the blue and white grids collapsing into a single spark that sank through the floorboards and left us with the sudden, ugly quiet of being cut off from the people who knew the most about the bomb that had gone live before we could defuse it.

The old emergency Wards ignited instead. Blue and white light crawled up the walls, found the ceiling beams, and locked around the cabin with a sound like ice forming over deep water.

I hated losing Carrick’s voice with immediate and unreasonable focus. It was not that I trusted him to save us. It was that I trusted him to tell us exactly how doomed we were using complete sentences.

Now we had no Carrick, no Ginnie, no main grid, and a black-and-red response lattice still unfolding against the inside of the watch station.

Well. Guess we were improvising against Hell.

The response lattice did not disappear.

That was the first bad sign. Isolation had stopped it from spreading through Arrhythmia’s larger Ward network, but the thing had already taken hold of the cabin itself. What had been stretched across the outer barrier folded inward, layer by layer, contracting around the little watch station like a fist closing around bone.

Maisie stared at the wall where the blue and white emergency Wards trembled under a skin of black and red geometry. “That is not what it did last time.”

“No.”