They started with foot placement.

  Not because it mattered.

  Because it was the only thing left that still pretended to be stable.

  The ring was quiet except for the sound of boots against stone. No heat. No grooves lit. No instruments chirping yet. Just lines etched into the floor and a trainer who had learned not to trust them.

  Karael stood on the inner mark, shoulders loose, hands open at his sides. He was not braced. Bracing made the heaviness worse. It compacted faster when he anticipated it.

  The trainer circled him slowly.

  “You do not fight yet,” the trainer said. “You learn where not to stand.”

  Karael nodded.

  A venter stepped into the ring opposite him. Not the clean one from before. Older. Scarred. Flow tier. The kind who had survived long enough to believe his instincts were better than doctrine.

  “Approach,” the trainer ordered.

  The venter moved.

  Three steps. Clean. Confident.

  On the fourth, his boot landed wrong.

  Not a slip. Not imbalance. His heel touched where his mind said it should not have reached yet.

  He frowned and adjusted.

  The air tightened.

  Karael felt it immediately, a subtle inward pull like pressure redistributing to maintain balance. His chest responded before thought, compacting a fraction deeper.

  The venter took another step.

  Too far.

  He stopped sharply, confused, breath hitching.

  “That’s wrong,” he muttered.

  The trainer did not intervene. “Continue.”

  The venter advanced again, slower now, eyes flicking between Karael’s feet and the floor markings. He stopped short this time, leaving too much distance.

  “That’s also wrong,” the trainer said.

  The venter swore under his breath. “The mark isn’t moving.”

  “No,” the trainer replied. “You are.”

  Karael swallowed. The heaviness did not recede. It listened.

  The trainer gestured. “Reset.”

  The venter backed away and exhaled hard. Sweat darkened his wraps.

  Another venter entered. Younger. Spark tier. Nervous.

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  He approached Karael cautiously, stopping early.

  “That’s safe distance,” he said quickly, as if announcing it would make it true.

  The trainer shook his head. “That’s fear distance.”

  The young venter flushed. “It felt closer.”

  Karael looked down at his own feet.

  He had not moved.

  The air had.

  The trainer turned to Karael. “Step back one pace.”

  Karael did.

  The heaviness shifted upward slightly, not painful, but demanding attention.

  The older venter blinked. “It moved again.”

  “It did not,” the trainer said. “You did.”

  The young venter swallowed. “This is what Tier Two does.”

  The trainer’s eyes stayed on Karael. “Tier Two does it to enemies.”

  Silence followed.

  The handler watched from the doorway, slate held idle. He did not interrupt. This was better data than instruments.

  The trainer walked to the center and faced Karael directly.

  “When a Ciner stalks,” he said, “it denies you certainty. Your training tells you where you are. The space tells you something else.”

  Karael nodded slowly.

  “You do that,” the trainer continued. “By standing.”

  Karael’s jaw tightened. “I’m not trying to.”

  “That does not matter,” the trainer replied. “Neither is a Ciner.”

  The handler spoke for the first time. “Repeat with motion.”

  The trainer nodded once. “Walk the lane.”

  A narrow path was marked across the ring, straight and simple.

  Karael stepped onto it.

  The air tightened immediately.

  Not sharply.

  Deliberately.

  He walked forward at a steady pace, breathing slow, not braced, not anticipating. The heaviness remained compact, dense but quiet.

  The trainer walked parallel to him, just outside the lane.

  “Do not look at your feet,” the trainer said. “Look at me.”

  Karael did.

  On the third step, the lane ended early.

  Not physically.

  Functionally.

  Karael’s foot met stone where his body expected space.

  He stumbled.

  Caught himself.

  The trainer’s hand shot out, gripping his shoulder, stabilizing him.

  The air snapped.

  The heaviness surged violently.

  Karael gasped as pressure compacted inward, sharp and sudden, stealing his breath.

  The trainer swore and shoved him back out of the lane.

  The ring exhaled.

  Karael dropped to one knee, coughing, chest burning.

  The handler stepped forward. “Stop.”

  The trainer looked at Karael, anger and concern mixed together. “You didn’t fall because you’re uncoordinated. You fell because the lane stopped existing.”

  Karael wiped blood from his lip. “Then don’t make me walk it.”

  The trainer stared at him. “We have to.”

  “Why.”

  “Because next time,” the trainer said, “the lane will be a corridor full of people.”

  The handler nodded. “Continue. But change the variable.”

  The trainer considered, then said, “Approach him again. This time, he moves.”

  Karael frowned. “Moves where.”

  “Doesn’t matter,” the trainer replied. “Just move.”

  A venter stepped in. The older one again.

  Karael took one step sideways.

  The air warped.

  The venter’s balance shifted instantly, not enough to fall, enough to force correction.

  The venter growled. “That’s wrong.”

  Karael took another step.

  The heaviness surged harder, compacting inward as if resisting motion itself.

  The venter stumbled.

  The trainer lunged and caught him before he fell.

  “Enough,” the handler snapped.

  The trainer backed away, breathing hard. “He can’t move freely.”

  Karael looked up at them. “I can walk.”

  “You can,” the trainer agreed. “But not without rewriting space around you.”

  The handler’s slate finally chimed, numbers jumping erratically.

  “Confirmed,” the handler said quietly. “Proximity distortion intensifies with motion.”

  The trainer wiped his face. “Then doctrine fails.”

  The handler looked at him. “Explain.”

  “Doctrine assumes space is consistent,” the trainer said. “Distance, timing, rotation. All of it depends on knowing where you are.”

  He looked at Karael. “Near him, you don’t.”

  Silence settled.

  Karael pushed himself to his feet slowly. The heaviness followed, settling lower again, compact and patient.

  “So what do you do,” Karael asked.

  The trainer stared at the floor for a long moment.

  Then he looked up.

  “You stop treating him like a hazard to avoid,” he said. “And start treating him like terrain.”

  The handler’s eyes narrowed. “Clarify.”

  The trainer’s voice was steady now. “You don’t tell soldiers to ignore cliffs. You teach them how to fight on them.”

  The handler did not answer immediately.

  Karael felt the air tighten slightly, like the system itself was listening.

  “If he’s terrain,” the handler said finally, “then moving him changes the battlefield.”

  “Yes,” the trainer replied.

  “And keeping him still creates a fixed distortion,” the handler said.

  “Yes.”

  Another silence.

  Karael realized something then, cold and sharp.

  They were not deciding how to protect others from him.

  They were deciding how to use him.

  The handler closed his slate.

  “Continue tomorrow,”

  The guards stepped forward.

  As they escorted Karael out, the trainer spoke once more, not loudly.

  “You don’t move wrong,” he said. “You make everyone else do it.”

  Karael did not respond.

  The corridor felt narrower than before.

  Not physically.

  Relationally.

  Behind him, the ring remained distorted for several seconds after he left.

  Long enough for the trainer to notice.

  Long enough for the handler to record it.

  And long enough for the Furnace, deeper than either of them, to remember how space behaved when Karael walked.

  The next lesson would not be about distance.

  It would be about survival.