The last white route line disappeared beneath Kael’s heel.
Black plates slid together across the corridor behind him, sealing one after another until the passage became a smooth wall. Fourteen reflections stared back from its surface. Several belonged to people who had already turned away.
HUM!
The vibration climbed through Kael’s boots and settled behind his ribs. Cold air pressed inward from every side, carrying the sharp mineral smell of freshly cut stone.
Orrek glanced over his shoulder. Dried blood had stiffened his beard, and his wounded arm remained tucked close to his body. "I liked the ugly tunnels better. At least they had the decency to look dangerous."
Jaro covered his nose with both hands. His eyes had begun to water. "This glass is dangerous. It simply expects us to notice too late."
HISS!
Thin ridges rose from the floor and curved overhead. Their polished surfaces caught each survivor from several angles, dividing faces from bodies and hands from arms. The corridor was building a narrower passage inside itself.
Renn touched the scar across his throat. His lips moved around a count he had learned not to trust aloud.
Vaela noticed and moved beside him. "Use your fingers. I need you breathing more than I need to hear the number."
"I know how many people are here," Renn whispered, although his hand had already closed around the count cloth.
"Your throat does not care what you know. Give it less work."
Renn looked annoyed enough to obey. He pressed his thumb against four fingers in turn and began again with his other hand.
Kael kept one shoulder angled toward the rising ribs. The walls, floor, and ceiling drew another breath together, yet the sound also seemed to come from the cut beneath his ribs. The maintenance sign had called him a Living Contamination Event. Whatever controlled this passage had noticed the people walking near him and had closed the route around all of them.
The Sovereign Root remained silent.
A name on a wall could not feed it. Fear could not feed it. Only hostile pressure survived by Kael’s body could become Existential Shards, and he had already spent every shard he owned.
Zero did not leave him helpless. It left him without an answer he had not yet earned.
The new passage stopped widening when its sides stood barely far enough apart for Orrek’s shoulders. Air ceased moving inside it. Tavin stared into the dark opening and swallowed.
GULP!
Renn caught his sleeve before he could step backward. "Cover your mouth and take small breaths. Watch my hand if you lose the count."
Tavin wrapped a strip of cloth over his nose. "Your hand is shaking."
"You can complain about it after we get through."
The nearest glass ribs changed their reflections. Tavin appeared first, pale and frightened. Vaela replaced him, followed by Orrek and Kael. Each image broke into narrow strips, as if someone behind the walls were studying which person could be removed without scattering the rest.
Kael moved between Tavin and the glass.
Every reflection became his.
The corridor stopped breathing.
Vaela lowered her voice. "It watched Tavin until you protected him. The passage is learning who can pull you out of position."
Kael watched the ribs instead of her. "Keep looking. Tell me when the pattern changes."
Orrek shifted his chain into his unwounded hand. "I would offer myself as bait, but the thing might decide I lower the value of the group."
Jaro gave him a tired look. "It might be the first sensible decision this place has made."
Orrek smiled, and for a moment the fear behind them loosened.
A line of dark light ran over Kael’s boots. It climbed his legs, crossed his chest, and stopped beneath his jaw. His lungs clenched. The pressure lasted only a heartbeat, but his next breath had to be dragged past it.
No alert came.
The passage was testing him without committing enough force to earn a shard.
CLACK!
The wall behind them thickened, swallowing the last trace of the route they had used. Renn finished counting by touch and raised his head.
"Everyone is here," he said. Pain roughened each word, but he did not look away from Kael.
Vaela checked the nearest child and the burned man beside her. "Everyone is standing. I will accept that for now."
Kael faced the narrow opening. "We move in one line. Cloth over your mouths, one hand on the person ahead of you, and no one follows a reflection."
The survivors arranged themselves without argument. Vaela took the middle where she could reach either half of the line. Renn stayed beside Tavin and counted knuckles instead of names. Jaro kept testing the air with frightened little breaths. Orrek went last, his chain hanging loose from his sound hand.
Kael entered first.
The glass bent away from his shoulders by less than the width of a fingernail.
Orrek saw it from the rear. "You made it move."
"It moved because it has not decided how much force it needs."
"I preferred my answer."
The line followed. Blood, ash, cloth, and callused hands joined fourteen people into something the corridor could not separate without effort.
SCRAPE!
Glass rubbed against the stone behind them. A strip of the wall peeled away and folded into the narrow passage, reducing the space around Orrek’s chest. He turned sideways and kept walking.
A woman near the back cried out. Her reflection had leaned forward before she did.
Vaela twisted around without leaving her place. "Look at the shoulders in front of you. The glass cannot lead you anywhere if you stop watching it."
"It has my face."
"Your face is here with us. Keep your hand on Lysa and prove it."
The woman tightened her grip. Lysa murmured something Kael could not hear, and a nervous laugh passed through three survivors. It sounded thin, but it belonged to them. The corridor could copy their faces. It had not learned how to make them laugh.
Another breath moved through the black glass.
A crown appeared farther ahead, suspended above the passage without a head beneath it. Narrow teeth of polished glass formed its ring. Each tooth held a different image of Kael.
One showed him sealed from the neck down. Another showed his hands lying apart from his arms. A third showed the survivors walking past an empty space where he should have been.
The Sovereign Root offered no warning.
Kael rolled his shoulders. The white cut in his side pulled against its dressing. Old needle scars tightened along his arms, and the deep ache in his marrow reminded him of every change his body had survived. The images were threats, not damage.
He stepped forward.
The crown trembled.
Everyone behind him saw it.
Fear did not disappear from their faces. It became easier to carry once the thing frightening them had reacted to Kael.
He held one hand behind him. "Stay close enough to touch me if the passage moves."
The survivors pressed forward. No one mistook the order for a promise of safety.
The wall at their backs darkened until their reflections vanished. Far ahead, an eye opened within the crown. It did not blink. Its black surface widened and narrowed while the corridor stole warmth from the air.
The children felt the cold first. One beside Lysa began breathing too quickly.
GASP!
Renn reached across Tavin and pressed the count cloth into the child’s palm. He tapped twice against the small wrist, paused, and tapped again. The child followed the simple rhythm until each breath stopped chasing the next.
"Keep doing that," Renn whispered. "The cloth is slower than the walls."
The child nodded and held on.
Vaela kept her attention on the crown. "It has tested breathing, fear, and who Kael protects. It still wants a cleaner answer before it closes."
Jaro wiped his nose on his sleeve. "The glass ahead smells newer. Cleaner than the dead-song gate and cleaner than the repair rooms."
"What does cleaner mean here?" Renn asked.
Jaro hesitated while another pulse passed through the floor. "New machinery, fewer repairs, and people who never needed to hide what happened inside it."
CREAK!
Thin marks opened above every survivor. Each resembled an empty tag hanging from an unseen hook. They remained high enough to avoid touch, waiting while the eye watched the group move beneath them.
Renn’s fingers stopped for half a beat. "Are those meant for us?"
"They are empty," Vaela said. "Keep them empty by staying with the line."
Kael stepped beneath the first mark. It shivered away from the pressure of his body, leaving enough room for the others to pass. The next mark retreated as well.
The corridor had tried to frighten them into breaking formation. It had tested Tavin because Kael would protect him, chilled the children because Renn would notice, and shown false deaths because every survivor carried a reason to look back.
None of those attempts had worked.
The crown opened wider as Kael approached. Behind it, several tall shapes moved through the glass. Their limbs were too smooth to be ordinary workers, and their heads carried the same dark rings as the crown above the route.
Jaro’s breathing faltered.
"Those are not reflections," he said.
Vaela moved the children behind Orrek and checked the cloth over Tavin’s mouth. Renn gathered the count cloth in his fist, ready to use it without giving the walls another spoken number. Even Jaro stayed in place instead of searching for a side passage.
Kael flexed his hands while the fourteen gathered behind him.
The eye watched him prepare to meet whatever had been sent to make the quarantine permanent.