The footprints were mine.
Xavier realized it first.
That offended me enough that, for several seconds, I attempted to prove him wrong.
The corridor stretched perhaps forty meters ahead of us, covered in the same fine gray powder we had disturbed in the mirror chamber. Two sets of human footprints traveled through the center.
Between them, faint claw marks appeared every few steps.
Rex.
I crouched.
The nearest boot print was narrow at the heel, slightly deeper on the outside edge.
Mine.
Probably.
"Could belong to someone with similar boots."
Xavier crouched beside me.
"You damaged your left sole at the bakery."
I looked at him.
He pointed.
A small crescent-shaped gap interrupted the outer edge of the print.
I lifted my left boot.
Same missing piece.
There are moments when evidence becomes personally insulting.
Rex sniffed the track.
Then my boot.
Then the track again.
His ears shifted backward.
"I think he's offended too."
"At least he has an excuse."
Xavier moved farther ahead.
His own prints crossed mine once.
One carried the irregular triangular pattern from a repair done aboard Sierra months ago.
Not an unknown expedition.
Not a survivor.
Us.
Walking ahead of ourselves.
I stood and examined the corridor again.
The walls were different from the mirror chamber.
The ceiling was different.
The floor—
I looked harder.
A black groove crossed beneath the dust about eight meters away.
I remembered it.
Not from here.
From the hall before the mirror chamber.
Same fork.
Same chipped corner.
Xavier followed my eyes.
"Oh."
"Yes."
"The floor moved."
"Apparently."
"While we were in the mirror room?"
"Or before."
"Could it have rotated?"
"Likely."
"Teleported?"
"Possible."
"Rebuilt?"
"Possible."
He frowned.
"I miss streets."
"I spent months complaining about streets."
"You were wrong."
That was becoming distressingly common.
The castle had not created our footprints.
It did not need to.
A portion of floor we had already crossed had simply arrived before us.
Several meters of our recent past now occupied the route ahead.
That was worse in a useful way.
Time travel would have been irritating.
Moving architecture was merely homicidal.
Xavier took out his notebook.
"No more maps."
I looked at him.
"That seems premature."
"They're useless."
"No. Absolute maps are useless."
He waited.
I corrected myself.
"Potentially useless."
"Better."
He wrote at the top of a new page.
STATE ONE.
Then:
Floor — gray dust / black forked groove.
Walls — no visible mana veins.
Sound — normal echo.
Orientation — assumed only.
Time since mirror chamber — approximate.
He looked at me.
"Anything?"
"Temperature."
He added it.
"Mana response."
Added.
Rex walked several paces ahead.
"Scent," Xavier said.
I stared.
He shrugged.
"He knew the alcove was wrong."
Fair.
He added:
Rex response.
No dignity survived good methodology.
I copied the structure into the Blacklist.
Not room.
State.
That distinction mattered.
Catington had taught me to ask when information had been obtained.
Pandemonium added another question.
Was the thing observed still in the same place?
We continued.
This time neither of us followed the footprints as a route.
They were evidence.
Old evidence.
Perhaps five minutes old.
Perhaps useless.
At the far end of the corridor, the stone changed.
No door.
The walls simply opened.
Cold air touched my face.
Real cold.
Wet.
I smelled soil.
Xavier stopped beside me.
"You smell that?"
"Yes."
Rex had already moved forward.
The corridor ended on a ledge overlooking a forest.
Not a decorative garden.
A forest.
Inside the castle.
For several seconds none of us spoke.
The chamber was enormous enough that my eyes struggled to establish scale.
The ceiling disappeared into pale mist hundreds of feet above us. Long ribs of dark metal arched through the vapor, each carrying lines of silver light that produced something close to moonlight without any visible moon.
Rain fell from the mist.
Slow.
Constant.
Below us, pale trees grew from black soil.
Their trunks were smooth and almost white. Leaves the color of old silver trembled beneath the rain. Thick black roots broke through the ground in long ridges before disappearing into pools that reflected the artificial light.
No wind.
Yet sections of the canopy moved.
Water ran down the ledge beneath my boots.
Somewhere far inside the biome, something called once.
Low.
Then stopped.
Xavier stared.
"Marduk?"
I opened Devil's Deceptions.
Several pages later, I found a sketch.
Trees.
Rain.
A curved overhead structure.
Beside it:
GREEN SECTOR — WATER AVAILABLE.
Then an ink smear.
The following line had been partially destroyed.
Only three words remained.
DO NOT DRINK—
Excellent.
Xavier read it.
"Helpful."
"He was consistent."
"Water available. Do not drink."
"Perhaps the missing phrase was 'too quickly.'"
"Or 'the water.'"
"That would be less convenient."
Rex approached a narrow stream running across the ledge.
I let him.
He lowered his head.
Sniffed.
Did not drink.
Instead he backed away.
That answered enough for now.
Xavier watched him.
"Rule?"
"Nothing here becomes a rule after one example."
"Observation?"
"Rex refuses the water."
He wrote it.
The rain darkened his hair.
Mine too.
After the dry stone corridors, the sensation was almost pleasant.
That worried me.
I removed one of the physical collection flasks from my pack and let rainwater enter without touching the surrounding plants.
Not for drinking.
Sample.
We could examine it later with Balthazar's field tools.
The spatial ring remained cold.
I tried opening it only enough to test resistance.
The seam barely formed.
Pain pressed through my fingers into the wrist before the pocket opened.
I closed it immediately.
Xavier noticed.
"Worse?"
"Yes."
"Then we don't use it."
"Unless necessary."
"That's what I said."
"No, you made it sound absolute."
"You make survival exhausting."
We descended.
The ledge became a narrow stone stair swallowed gradually by vegetation.
At the bottom, black soil compressed beneath our boots.
Soft.
Not mud.
Almost springy.
Xavier crouched and pressed two fingers into it.
Earth mana flowed.
His face tightened.
"What?"
"Roots everywhere."
"That is usually how forests work."
"Not like this."
He drew a shallow line through the soil.
A pale root lay less than an inch below.
Another crossed beneath it.
Then another.
Dense enough to form a woven layer.
"They're connected."
"All plants?"
"I don't know."
Good.
We moved around rather than through the largest root beds.
Rex chose the path.
That was becoming sensible policy.
The deeper we went, the less the forest resembled ordinary vegetation.
Some leaves held water on their underside rather than their top.
Several trees had no branches below twenty feet, only smooth trunks surrounded by clusters of translucent sacs that expanded when rain struck them.
One of the sacs pulsed.
Xavier stopped.
"Fruit?"
"No."
"You don't know."
"Neither do you."
"It looks like fruit."
"It looks like a bladder."
"That does not improve it."
We left it alone.
Hunger was not yet a problem.
Curiosity had killed more intelligent men than starvation.
After perhaps forty minutes, the light above shifted.
Silver became faintly blue.
Every leaf in the forest turned at once.
Not dramatically.
A few degrees.
Toward us.
I stopped.
Xavier stopped because I had.
Rex had stopped before both of us.
No wind.
The rain continued.
The leaves moved again.
Not toward us.
Toward the stream to our right.
Something moved beneath the water.
A narrow wake.
Fast.
Gone.
Rex growled.
I opened Board Sight carefully.
Water.
Roots.
Xavier.
Rex.
Movement—
Nothing.
The stream carried too much ambient mana.
Every root beneath it glowed faintly in my perception.
The wake returned.
Closer.
Xavier raised one hand.
Water lifted from the stream in a thin sheet.
Not enough to expose whatever lived below.
Enough to distort the surface.
The wake stopped.
Then appeared behind us.
Impossible.
Unless there were two.
I turned.
A pale body crossed between the trees.
Low to the ground.
Longer than Rex from head to tail, but much lighter.
Six limbs.
Smooth hide broken by dark plates along its shoulders and spine.
No eyes that I could see.
Its head narrowed toward a mouth hidden beneath folded bone-like ridges.
It vanished behind a trunk.
Rex moved after it.
"Stay."
He ignored me.
Not completely.
He advanced three paces instead of charging.
Improvement.
The creature appeared to our left.
No transition.
One instant absent.
The next ten meters closer.
Live Notation slammed into place.
INPUT: LOWER-LIMB MANA
ROUTE: REAR PAIR → SPINAL CHANNEL
TRIGGER: SHOULDER COMPRESSION
OUTPUT: ACCELERATION BURST
RECOVERY: 1—
The number did not finish.
The creature disappeared.
I shifted right.
Exactly according to the line I had just read.
Wrong.
It struck from the right.
Its shoulder hit my chest.
No claws.
Mass.
Enough.
Air left my lungs.
I went backward into wet soil.
The notation shattered.
Xavier shouted my name.
Rex hit the creature before it could turn.
Both bodies rolled through silver leaves.
The predator twisted with impossible flexibility and kicked free.
It did not flee.
It circled.
My chest burned.
Nothing broken.
Probably.
I stood.
Live Notation had described a technique.
Correctly.
I had decided it described the only technique.
Stupid.
"Two patterns," I said.
Xavier moved beside me.
"You discovered that with your ribs?"
"Excellent instrument."
The creature blurred again.
This time I watched the whole body.
Shoulders compressed.
Rear channels lit.
Pattern one.
It accelerated straight toward Rex.
Then its spine twisted halfway through the burst.
Mana rerouted through the middle limbs.
Direction changed.
There.
Secondary correction.
The first notation had ended too soon because I had ended the observation too soon.
Xavier threw water.
Not at the creature.
Across the ground.
A thin film spread between the trees.
The predator moved.
Water erupted beneath six points.
Footprints.
For half a second I saw its path even when my eyes lost the body.
"Again," I said.
"I know."
It came for him.
Xavier did not retreat immediately.
Earth gathered under his boots.
Rhythmic Permutation changed his breathing.
Three.
Pause.
One.
Two.
The predator burst.
Xavier stepped aside on the second correction instead of the first.
Its shoulder missed him.
His palm hit the wet ground.
Soil hardened around one rear limb.
Only for an instant.
The creature tore free.
But the effort slowed it.
Rex lunged.
The predator turned toward him.
I saw the spinal channel brighten.
Primary burst.
Correction.
Another correction.
Then—
nothing.
Half a heartbeat.
The entire lower mana network dimmed.
Recovery.
Not after the burst.
After the last correction.
Chessmaster tried to write it.
I refused to read.
I already had enough.
"Xavier. Make it turn."
He looked at me once.
Understood the shape, not the details.
Water struck the predator's left side.
Annoyance more than damage.
It turned toward him.
Burst.
First correction.
Xavier gave ground.
Second.
Rex pressed from the opposite side.
Third.
The creature twisted away.
Mana dimmed.
I increased gravity.
Only on its front limbs.
Only for the recovery window.
The predator hit the ground harder than expected.
Its body folded.
Rex arrived.
He did not bite the throat.
He slammed both forelimbs into its shoulders and held.
The creature thrashed.
Xavier raised wet soil around its rear legs.
Not stone.
Heavy mud reinforced by Earth mana.
The predator fought harder.
I increased gravity again.
Short.
My mana reserve dropped sharply.
The creature stopped.
Not surrendered.
Calculating.
It flexed once.
Twice.
The spinal channels tried to light.
Failed under the angle.
Then one of the dark plates along its back detached.
Not skin.
A plate.
It struck the ground and released a burst of white vapor.
Rex recoiled.
So did Xavier.
I lost visual contact.
The gravity field broke.
By the time the vapor cleared, the creature had crossed thirty meters.
It reached a wall of pale trees.
Paused once.
Then disappeared into the rain.
Xavier breathed hard.
"You call that a victory?"
"We're alive."
"It left."
"We didn't ask for a trophy."
Rex sneezed repeatedly.
He looked furious.
I crouched beside him.
No obvious injury.
The vapor had irritated his nose more than anything else.
Xavier retrieved his sword from the mud.
"You could have warned me it had smoke."
"I'll ask it next time."
He stared.
Then laughed despite himself.
The fight had lasted perhaps thirty seconds.
My mana felt as if we had been working for ten minutes.
I sat beneath one of the trees.
Not because I needed rest.
Because standing had become theoretically unnecessary.
Chessmaster opened without permission.
No full notation.
A single classification.
TARGET OBSERVED: UNKNOWN PREDATOR.
COMBAT MODEL: INCOMPLETE.
Then:
CAPTURE CANDIDATE DETECTED.
I went still.
Xavier noticed.
"What?"
"Chessmaster."
"That narrows nothing."
"It recognized a compatible fragment."
"From that thing?"
"Possibly."
"What fragment?"
The line formed reluctantly.
MANA-ASSISTED RECOIL / TENDON-CHANNEL COORDINATION.
COMPATIBILITY: UNRESOLVED.
MATERIAL SAMPLE: INSUFFICIENT.
INTEGRATION: NOT AVAILABLE.
Good.
Very good.
Not because it offered power.
Because it refused to pretend.
Analyzed Capture.
An opportunity after a real combat.
No magical theft.
No instant imitation.
We possessed one detached dorsal plate from the creature.
Not tendon.
Not muscle.
No safe biological sample.
No controlled operating space.
No reason to perform Alchemia Morphica in a wet forest five hours after arriving inside a castle that rotated floors.
I took out a sealed specimen envelope.
Placed the detached plate inside.
Labeled it.
Xavier watched.
"You're not doing anything with it?"
"Not today."
He blinked.
"Are you ill?"
"Probably maturing."
"More dangerous."
I put the sample in the physical pack.
Not the ring.
If we survived long enough to establish a proper workspace, Balthazar's kit might allow an analysis.
If not, the creature could keep its trick.
There would be other opportunities.
That sentence surprised me.
Months earlier I would have treated rarity as instruction.
Pandemonium had been educating me for less than a day.
I disliked its teaching methods.
---
We did not drink the stream water.
The rain sample waited.
We ate travel bread instead.
Lucien's.
Hard enough to survive impact.
Probably capable of serving as masonry.
Rex ate dried meat.
Xavier sat with his back against a pale trunk, writing the fight from his perspective.
I watched him.
"What?"
he asked.
"You're documenting."
"Yes."
"You hated my ledgers."
"I hated your personality."
"Ah."
"Still do."
Comforting.
He wrote:
Predator altered cadence after first engagement.
Then underlined it.
"Why that?"
"Because your weird writing thing almost got you flattened."
Fair.
He added:
Do not assume repeated technique means fixed sequence.
I copied that too.
Two records.
Again.
The blue light above the forest gradually returned to silver.
The leaves changed orientation.
This time away from us.
We packed.
Before moving, I checked the watch.
A little over three hours since our first recorded observation in the forest.
Xavier checked his.
His showed almost the same.
Difference of several minutes.
Could be mechanisms.
Mana interference.
Nothing worth inventing a temporal theory over.
Yet.
We followed the outer root line rather than the stream.
Rex led.
An hour later, the forest ended.
No gradual thinning.
One row of pale trees.
Then stone.
A narrow maintenance corridor cut between two root-covered walls.
The rain stopped at the threshold as neatly as if separated by glass.
We crossed.
Rex shook himself violently.
Xavier received most of the water.
"Rex."
The manticore looked innocent.
He was learning from me.
The corridor curved downward.
No light veins.
Only faint luminescent moss growing along one side.
Natural?
Maybe.
At the first bend, Xavier stopped.
"What?"
He pointed low.
A cord.
Thin.
Brown.
Tied between two metal brackets six inches above the floor.
Not part of Pandemonium.
At least not like anything we had seen.
I crouched.
Fiber.
Twisted by hand.
Attached to a small metal cup hanging behind a broken wall plate.
A bell.
Crude.
Someone had built an alarm.
Xavier looked toward the dust.
"No tracks."
"Recent disturbance?"
"Hard to tell."
Rex sniffed the cord.
His ears moved.
Then he looked down the corridor.
No growl.
Attention.
I opened Board Sight only enough to inspect the immediate space.
Nothing obvious.
No mana concentration.
No body.
No moving wall.
The handmade cup swung slightly.
We had not touched the cord.
Xavier saw it.
His sword came out.
The cup moved again.
Once.
Then stopped.
A voice came from farther down the corridor.
Human.
Hoarse.
Calm enough to be more concerning.
"If you're real, step over the line."
Xavier looked at me.
I looked at the cord.
The voice continued.
"If you're the room wearing people again…"
A pause.
"…do us both a favor and keep walking."
Rex's mane rose.
Not violently.
Recognition of something alive.
For the first time since crossing the portal, Devil's Deceptions had nothing useful to say.
Chessmaster offered no classification.
And somewhere beyond the bend, another person was waiting for us.