"Don't move."
Elias said it like a prayer he did not believe in.
Kaelen did not look at him right away.
He kept his eyes on the loose fire extinguisher bolted to the wall beside the train door.
Red canister.
Cheap bracket.
One screw missing.
The sort of detail that only mattered if the world had turned into a machine with bad wiring.
The carriage shuddered again.
Somewhere ahead, metal screamed.
Kaelen's right hand hung loose at his side.
His left stayed near the pole, fingers half-curled, ready.
Not tense.
Not relaxed either.
Just waiting in the ugly middle where action began.
Elias saw it.
He saw the hand.
He saw the extinguisher.
He saw the way Kaelen looked at both of them like a man reading a receipt.
"No," Elias said, voice breaking on the word.
"No, no, no.
I am not doing this.
Whatever you're thinking, I'm not part of it."
Kaelen finally turned his head.
Elias looked worse up close.
Not dramatic-worse.
Just real-worse.
Sweaty collar.
Dry lips.
Eyes too wide and too awake.
A man who had spent his whole life filing numbers into safe little boxes and had just discovered the boxes could bleed.
"You already are," Kaelen said.
Elias swallowed.
"What does that mean?"
Kaelen did not answer.
The answer was simple, and he did not feel like giving it away for free.
The carriage lights flickered again.
This time the flicker lasted longer.
A strange, gray pulse moved through the floor, like the train had inhaled something it could not digest.
Kaelen looked down.
The metal under his shoes had gained a hairline ripple.
Not damage.
Not yet.
A shift.
The tunnel had changed shape.
That was bad.
His memory of the first cycle returned in hard, clean pieces.
The train.
The collapse.
The way the Interface did not just invade a body.
It invaded physics first.
Then people.
Then language.
Then whatever passed for mercy.
He angled his body a fraction toward the door.
"Listen," Elias said.
He had that frantic edge now, the one people got when they realized the wrong person was calm.
"If you know something, you need to say it.
There are children here.
There are people.
You saw that thing.
Those bodies."
Kaelen almost smiled at that.
People always found morality faster when it was no longer theoretical.
"You want the short version?" he said.
"Stay behind me.
Don't touch the floor unless you have to.
And if the car tilts, sit down."
Elias stared.
"That is not a short version.
That is nonsense."
Kaelen looked at him.
"Then die confused."
Before Elias could answer, the train lurched hard to the left.
Not a normal sway.
Not brake failure.
This was a sudden, brutal rotation, like the whole carriage had been seized by a giant hand and twisted.
Bodies slammed sideways.
A woman hit the window and cried out.
A man near the door fell across two seats.
Someone's phone flew from their hand and shattered underfoot.
Kaelen dropped low at once, one hand on the floor, knees bent.
The carriage screamed.
Metal groaned from beneath them.
The lights went red again, then white, then dead.
In the dark, something came loose from the wall and struck a passenger in the shoulder.
He went down yelling.
Then the train stopped being a train.
The left side of the carriage buckled outward.
A section of the tunnel wall had vanished.
The outer shell of the metro ripped open with a sound like fabric tearing in a storm.
Cold air rushed in.
Dust hit faces.
One seat tore free and vanished into blackness.
Elias grabbed the pole and screamed.
Kaelen did not.
He moved.
His body dropped under the bent frame of a seat as the carriage tilted toward the opening.
The loose fire extinguisher snapped free from its bracket and slammed into the wall with a thud.
Kaelen caught it on the rebound, fingers closing around the handle without thinking.
The world heaved again.
This time, the carriage did not merely tilt.
It twisted.
The tunnel geometry outside was wrong.
The tracks bent at a sharp angle that should not have existed.
Kaelen saw it in a flash, saw the line of steel curling like softened wire.
The Interface had altered the route.
Or the route had been rewritten around it.
It did not matter.
What mattered was that Elias, who had not been holding on properly, got thrown hard.
He hit the door with his shoulder first, then slid, then cracked his head against the metal frame.
He made a sound Kaelen had heard in a dozen dying men.
Not a scream.
Something smaller.
The noise a body makes when it is surprised by pain.
Kaelen moved one step.
Then another.
Not to save him.
To use him.
Elias staggered forward, eyes unfocused, one hand pressed to the side of his head.
Blood ran between his fingers.
"No," Elias whispered, and then he saw Kaelen.
The look on his face changed.
Not understanding.
Recognition.
Not of Kaelen himself.
Of the shape of intention.
Kaelen lunged.
The fire extinguisher came down in a tight arc.
Elias tried to duck, but he was late.
The canister slammed into his forearm and knocked his grip off the pole.
He stumbled backward into the crooked metal hinge at the door.
The carriage jerked hard.
That was enough.
The train's broken movement and the tunnel's warped angle did the rest.
Elias lost his balance and slammed shoulder-first into the outer frame, then slid down into the seam where the open shell met the torn floor.
His body caught for half a second, then the twisting force ripped him sideways.
He hit the edge again.
Then the carriage rolled.
Kaelen held on with one hand and felt the metal vibrate through his bones as Elias was thrown across the gap and pinned against the door by physics with no manners.
Not a clean hit.
Not a neat death.
Just enough.
The man coughed once, then twice.
Blood sprayed from his mouth, warm and sudden, and Kaelen saw the pattern immediately.
Lung damage.
Maybe rib fracture.
Fatal in minutes without help.
He stepped forward anyway.
Elias stared up at him, eyes glassy and furious.
"You," he said, and it sounded like accusation, disbelief, and the last scrap of human dignity all mixed together.
Kaelen crouched.
"Yeah," he said.
And when Elias tried to speak again, Kaelen caught his wrist, turned his palm upward, and pressed his thumb into the torn skin by the metal edge.
Elias gasped.
Blood welled.
Not much.
Enough.
The Interface shattered the air.
[Override Accepted.]
[Read Privilege Granted.]
The words did not appear as a window this time.
They hit Kaelen in the head like cold rain poured directly into the skull.
His vision snapped white for a second, and then the world changed.
He could see the train.
Not just the seats and the metal and the broken glass.
He could see tension.
Lines ran through the carriage, faint at first, then clearer.
Structural seams.
Weight paths.
Pressure routes.
Vectors of force held in place by stubborn materials and bad design.
The wall to his left had three weak points.
The ceiling brace above the second row was about to give.
The floor beneath the center rail was bowed by stress and one more twist would split it.
Kaelen exhaled through his nose.
Useful.
Very useful.
A pulse of pain throbbed in his forearm.
He looked down and saw black veins crawling under his skin in thin branching lines.
The virus had taken the blood and turned it into data feed.
His muscles burned like he had swallowed live wire.
"Tell me you did something good," Elias rasped.
Kaelen stared at him.
"I did."
That was all.
Then a sound came from the open tunnel.
Scraping.
Not one thing.
Many.
The carriage went still in that awful way people do right before they understand something worse has arrived.
Kaelen turned his head.
In the darkness beyond the torn shell of the train, something moved across the ceiling of the tunnel.
Then another.
Then another.
The first creature dropped into view with a wet clack of jointed limbs.
Kaelen had expected ugliness.
The Interface had already proven it enjoyed ugly.
What came down now was worse because it had a logic to it.
A Goblin Mechanical.
Not fantasy.
Not pure machine.
A green-skinned thing, half flesh and half infrastructure, with cables running from its jaw into its rib cage and fluorescent tube shards jammed into its mouth like broken teeth.
Its shoulders had been stitched around steel brackets.
One eye was real.
The other was a lens mounted into meat.
It scampered along the ceiling on hands that were too long and too human around the knuckles.
It sniffed.
Not air.
The cubes.
The pulsing cubes of organic matter left behind by the integration process.
The thing twitched toward the nearest one in the next carriage, drawn like a rat to fat.
Kaelen felt Elias go rigid beside him.
"You've got to be kidding," Elias whispered.
Kaelen did not spare him a glance.
"Stay quiet."
The goblin dropped from the ceiling and landed on all fours in the carriage ahead.
The impact bent the floor panel.
Its head jerked side to side.
Then it moved toward the nearest pulsing cube with quick, ugly hunger.
One of the passengers, a woman in a work uniform, made a sound in her throat.
The goblin snapped its head toward her.
Its single real eye glittered.
Kaelen read the carriage again.
Fast now.
The tension lines had shifted after the derailment.
The left rail was overloaded.
The emergency power strip beneath the seats still carried charge.
The old training tag in his head, the one he had once mocked because it sounded like a game mechanic, surfaced with brutal clarity.
Not magic.
Not destiny.
Just rules.
He leaned close to Elias.
"Can you stand?"
Elias laughed once, sharp and bitter.
"That's your question?"
"Answer it."
"I can stand badly."
"Good enough."
Kaelen shoved the extinguisher into Elias's chest.
"Hold this.
Don't use it yet."
Elias blinked at the weight.
"What are you doing?"
Kaelen stood.
The goblin had reached the first cube.
It opened its mouth and bit down.
The sound made three people gag.
Kaelen's eyes narrowed.
The thing was not here for the living.
It was here for the leftovers.
Harvest support.
Cleanup unit.
Maybe a scout.
Maybe something worse wearing a small mask.
Kaelen moved toward the collapsed gap in the carriage, careful with his footing.
The train still tilted, but now he could feel where the stress would travel next.
The structure had become legible.
It made his skin crawl and his mind sharpen at the same time.
The Interface gave him knowledge, but it took payment in pain.
Fair enough.
A blue window flashed briefly in front of his left eye.
[Structural Sight stabilized.]
[New Function Available: Tension Marking]
Kaelen ignored the rest and looked at the nearest weak point in the wall.
If he tore it open at the right place, the electrical line beneath the floor would arc.
If it arced along the broken shell, it would strike the ceiling rail.
If it struck the rail, it would light the tunnel.
Not enough to kill what was coming.
Enough to make it look.
He crouched near the torn floor, fingers brushing the cracked panel.
Heat pulsed through the metal.
The old maintenance route underneath the train still held current.
Bad engineering.
Good luck.
He muttered a line he should not have remembered.
A corrupted command, half from the virus, half from the thing he had stolen from dead systems years before he had died the first time.
"Route voltage to open seam."
Nothing happened.
Then the blood on his palm, still smeared from Elias's cut, reacted.
The black static in his veins flared.
Kaelen pressed his hand harder to the floor and felt the whole carriage answer with a tiny jerk.
The goblin paused.
Its eye lifted.
Good.
Kaelen smiled without humor.
"Now," he said.
Elias, who had been staring too hard to think, reacted on instinct and swung the extinguisher down onto the emergency power strip beneath the seat.
The canister cracked the plastic casing.
Sparks exploded.
White-blue light lashed out across the floor and climbed the bent metal frame in a jagged line.
The carriage became a flashbox.
Everyone screamed.
The goblin snapped toward the brightness, exactly where Kaelen wanted it.
Its head rose.
Its eyes caught the charge.
Then the tunnel answered.
The voltage surged through the open seam, through the broken shell, and into the arch above the goblin.
For one split second, the entire space lit up like a photograph burned into the back of the eye.
Kaelen saw what waited outside.
Not one goblin.
Not three.
Dozens.
No, more.
Hundreds of eyes gleamed from the dark tunnel walls.
Synthetic.
Wet.
Patient.
The goblin in the carriage hissed.
The others began to climb.
Elias made a sound that was halfway between a curse and a sob.
"You knew there were more."
Kaelen did not move.
He was too busy reading the new window that had just slammed open in front of him, black static crawling over the edges like mold.
[Function Complete.]
[Reward Deferred.]
[Attention Acquired.]
And beneath that, in letters that were too clean to be comforting:
[The Colony has noticed you.]