Green vapor crawled along the drainage road and found every low place.
It ate the mud first, turning each puddle sour.
The top layer bubbled where Vaela’s breath touched it. Old rail plates showed through in patches, then dulled under a pale coat that smoked without flame. Ty watched one of Ronnick’s broken spiders curl in on itself as the vapor reached the brass joints.
JJ kept her shoulder in front of him.
That helped less than she wanted. The vapor stayed low, and Ty’s injured foot stayed low with it.
The bandage around his boot darkened. Heat climbed through the cloth, thin at first, then sharp enough to make his toes lock. He put weight on his other leg and felt the road answer through every cut.
Blue pressed both hands against his collarbone from inside his shirt.
"That smoke is eating the wet places before the dry ones," she said. "Your bandage is becoming dinner from the bottom."
"Useful observation delivered with horrible bedside manner, Blue," Ty said.
"I offer truth because everyone else offers plans involving your pain."
Ty looked past JJ toward the walking frame.
The walking frame dragged one hooked brace free from the mud. Ronnick’s spiders had reached the knee gears. Two burned there, twitching as the acid vapor chewed through them. The third had vanished under the frame’s right foot with a crunch Ty felt in his teeth.
Ronnick flinched as if the spider had carried a piece of his own hand.
Osalf stood in the center of the road with his arms loose at his sides. He had no shield raised. Ty hated that first, then understood it. A shield would give Carden a shape to attack. Empty hands made the officers decide what danger they believed in.
Carden believed in himself enough to ignore the road.
The red armored man walked ahead of the frame, blade hanging beside his leg. The serrations caught green vapor and shook it loose in small drops that burned holes into the mud.
"Osalf brings wounded rebels through a sewer and calls it strategy," Carden said. "I expected dirtier work from a famous traitor."
Osalf answered without raising his voice. "You wore parade armor into acid runoff, so expectations are already suffering."
Milo, half hidden behind a support rib, whispered loud enough for Ty to hear.
"I want it known that I enjoyed that sentence while fearing the consequences."
Iven Marr lifted one white gloved hand, and the walking frame halted again. His armor stayed clean because two attendants in gray veils moved around him with narrow metal fans, pushing the vapor away from his boots.
Of course he had people for that too.
Ty looked at the attendants longer than he meant to. They kept their faces covered. Their shoulders moved like tired workers, not soldiers. One fan shook every time acid spattered against its edge.
Iven saw Ty looking and measured the mistake.
"The captive has sympathy for borrowed labor already," Iven said. "That makes him soft enough to transport alive."
JJ’s fingers shifted near her sword before thought caught up.
Ty caught the motion and touched her sleeve with the back of his burned hand. She stopped because she understood the problem. Any move from her made him look guarded. Too much guarding made him look valuable in the wrong way.
He needed to look trapped until the officers believed it.
He hated how easily his body understood that part.
Vaela opened the second valve wider. The vapor thickened around her boots, then rolled forward in a low wave that spread from wall to wall. It reached a broken rail and climbed over it like water deciding to become teeth.
Rosana threw a blanket over Vellor’s stretcher. The cloth began to smoke at the corners.
"Cover noses with dry cloth and keep injured hands off the ground," she called. "This stuff wants wet skin first more than armor."
"Dry cloth is now my favorite military doctrine," Milo said.
Tressa’s shadow pool opened wider beneath the supply crates. The black sheet wavered where the vapor touched it. She grit her teeth and lifted both hands, forcing the edge to stay round.
"I can drag the crates, or I can drag bodies," she said. "Someone choose before the road chooses for us."
Xuan Wei leaned against the wall and sent two wraiths down from the ceiling. They passed through the vapor without burning, but the acid clung to the stone behind them and smoked around the cracks.
"Bodies go first before supplies teach us regret," JJ said. "Supplies help survivors, and we need survivors first."
"That answer hurts my inventory soul, but I accept the math," Milo said.
Osalf glanced once at Ty across the broken rail line.
It looked like warning dressed as command from him.
It looked like apology too, which made Ty angrier.
Carden moved during that glance. He came fast, blade low, boots splashing through acid mud as if pain belonged to lesser people. Osalf shifted half a step and let the first cut pass in front of him. His palm struck Carden’s wrist without flash or chant.
The red blade dipped toward Osalf’s open side.
Carden laughed and drove his armored knee toward Osalf’s ribs.
Osalf took the hit on his forearm and gave ground. His boots slid through mud. Vaela’s vapor curled around his ankles. The green armor at her throat clicked as another valve opened.
JJ pulled Ty back by his sleeve before he leaned.
"You need higher ground before that reaches bone," she said. "The road already has enough of you for today."
"Higher ground is currently occupied by murder equipment," Ty said.
"Then find a smaller piece of higher ground and stop admiring disaster."
Ty looked down because pain had pointed there.
The rail plates ran beneath the mud in broken lanes. The acid vapor gathered in the grooves where water had pooled. On the right side, a drainage grate sat crooked between two teeth of metal. Cold air pushed up through it in thin breaths.
This came from old air below, not magic.
Air from somewhere deeper moved through the crooked grate.
His injured foot burned again, and his first thought was stupid enough to be useful.
Ty still had Milo’s coil of wire over one shoulder.
He pulled it free from his shoulder with care.
JJ saw the motion and narrowed her eyes.
"Tell me this plan contains less bleeding than your expression suggests," she said.
"The road is wet, the vent is cold, and Vaela’s acid likes wet things," Ty said. "That is the whole plan before it becomes worse."
"That is three facts wearing a stolen coat."
"Most plans around here are facts with worse tailoring."
Blue climbed from his collar to his shoulder, careful to keep her feet off the smoking bandage.
"If you make the cold climb through that wire, your hand will cramp first," she said. "Your foot will follow because it wants attention."
"My foot has been politically loud all morning," Ty said.
JJ stared at him, and for once the anger in her face had nowhere clean to go.
"Use me as the pull point before your hand fails," she said. "Your body already paid enough for other people’s cleverness."
Ty shook his head and gave the coil one hard swing. The wire rolled across the mud, bounced over a rail tooth, and dropped through the crooked grate. Cold air tugged at it.
"They need you looking like my guard right now," he said. "If you kneel with me, I stop being captive and start being protected."
"I hate that you learned that from them."
"I hate that it works on people like them."
The vapor reached the wire and curled around metal.
Ty wrapped the loose end around his burned palm.
Pain took the decision out of his fingers. The hand closed because opening it hurt worse. Cold climbed up from the grate, thin and dirty and threaded with mineral stink. It ran through the wire, through his palm, through the places where his body still remembered being bone before flesh.
The acid around the wire slowed in pale threads.
It became slush first. Green went pale where the cold touched it. Mud stiffened over the rail teeth in a rough crust. The vapor kept pushing forward, but the low wave broke around the frozen strip and curled back toward Vaela’s boots.
Vaela noticed before Carden recovered his footing again.
Her masked face turned toward Ty through the vapor.
"The captive is working the road against my breath," she said. "Iven, your soft transport is making himself expensive."
Iven’s mouth flattened into something too controlled, too quickly.
"Alive is preferred, but intact has become negotiable," he said. "Break the guard and take the boy’s hands."
JJ smiled without showing teeth and shifted her stance.
"He keeps calling me guard like I need employment," she said. "I may have to correct his paperwork myself."
She moved before Ty answered or Iven adjusted.
Her sword came out low and cut through the first fan handle. The attendant holding it stumbled back with a cry, hands still attached, fan ruined. JJ pivoted and kicked the broken frame into the vapor. The fan smoked, warped, and fell apart between Iven’s polished boots.
Iven stepped back at last, clean boots retreating.
That retreat looked small from the outside only.
Small mattered because polished men hated being moved.
Tressa used the gap. Her shadow pool swallowed Vellor’s stretcher and spat it out twenty steps behind the support wall, farther down the drainage road where the vapor had thinned. Rosana went with him, landing on one knee with her hands still on the stretcher poles.
Milo threw two crates after them and cursed when one vanished sideways.
"If my ammunition arrives in someone’s bathtub, I deny ownership and blame architecture."
Xuan Wei coughed once into his sleeve. His wraiths dropped from the ceiling onto the walking frame’s head casing and drove their fingers into the view slits. The frame lurched blind, hooked brace smashing into the wall where Osalf had stood.
Carden came out of the scrape grinning through dust.
"There he is, still spending breath on posture," he said. "The old Bull still knows how to dodge."
Osalf caught the next blade on a short burst of force. The impact shoved Carden sideways into the frozen strip Ty had made. His boot hit slush, slid, and punched through crust into acid mud.
Carden’s grin vanished when acid found the seam.
He tore his foot free before the vapor climbed his greave, but the stumble bought Osalf one breath. Osalf used it to strike the side of Carden’s helmet with his elbow. The red officer hit the wall hard enough to dent metal.
Ty’s hand cramped hard around the wire loop.
Blue grabbed his ear with both hands and pulled.
"Stop before your fingers decide to retire from the rest of you," she said. "The road is cold enough for people with sense."
"The road disagrees with everyone who survives it."
"The road has terrible judgment and a history of biting friends."
Ty pulled harder until his shoulder shook badly.
Cold answered too much and climbed past the burn.
The frozen strip widened across the drainage road. Acid vapor folded into it and fell as pale grains. The grains smoked when they touched warmer mud. Ty smelled old stone, sour water, and burning cloth. His injured foot went numb, which scared him more than pain because numbness gave no border.
Vaela adjusted her mask with both hands at once.
The tank on her back thumped once against armor.
Ronnick looked up from a ruined spider and shouted, "Valve pressure is climbing past control on her tank."
Vaela heard him and chose the wrong answer.
She opened the third valve anyway with both hands.
Green poured from her mask in a heavy sheet. It struck Ty’s frozen strip and crawled over it, slower now, thicker, too concentrated to break apart cleanly. The ice under it cracked with wet pops.
JJ turned toward him before the acid climbed higher.
"Drop the wire now, before it carries that back into your hand."
Ty tried to obey before his hand answered.
His fingers held fast against frozen blood and wire.
The burn across his palm had frozen to the wire. Skin pulled when he moved. He swallowed the sound before it escaped because Carden was watching again, and Carden seemed like a man who collected weakness for later use.
Osalf saw it too from across the road.
His face changed before he hid the concern.
Ty hated that most of all right then.
"Leave it until everyone clears the bad stretch," Ty said, forcing each word through his teeth. "Use the road while it is still listening."
JJ stepped close enough that her shoulder blocked Iven’s view of his hand.
"You are very bad at sounding disposable under pressure," she said. "Try less honesty next time someone threatens us."
She cut downward through slush beside his boot.
The blade avoided the wire by a finger.
She aimed at the mud packed around his boot.
Her blade carved a channel through the slush. Acid and meltwater rushed away from his foot toward the left wall. Tressa snapped her shadow pool across the new channel and pulled the liquid under before it reached the wounded line.
The wire tore free from Ty’s palm with skin.
He went down on one knee, not from drama, just because that leg had ended negotiations.
Iven raised his hand again toward the walking frame.
"Walking frame, retrieve the captive before the rebel guard burns the value off him."
The frame shook off one wraith. The other clung to its head casing as it lurched forward. Its hooked brace opened wide enough to close around Ty’s chest.
JJ moved to intercept before the hook descended.
Carden recovered first and spoiled the angle cleanly.
He struck the frozen strip with his serrated blade. Red force ran through the ice and cracked it in a jagged path toward JJ’s feet. She jumped back, and that half step gave the frame room.
Ty pushed up with his good foot under him.
His hand left a bloody print on the frozen rail.
Blue pulled herself flat against his shoulder as the hook came down.
Osalf shouted something Ty missed under the frame’s engine growl.
The hook closed around Ty’s upper arm and ribs, hard enough to lift him from the road.
Cold broke under him where acid rushed through.
Green vapor rushed into the gap he had been holding shut.