The bite landed behind the knee.
Not throat.
Not forearm.
Low, where a leg stopped being armor and became mechanism.
Mark felt teeth close through cloth and into flesh, a sharp pressure that did not shake for a kill. It held. It pulled just enough to steal his alignment.
The floor stole the rest.
Straw slurry slid under his boot, and his center dipped a fraction too far. The cracked rib caught the schematic board's edge under his belt wrap and sent a bright line of pain through his left side. His breath hitched. The drain tasted the hitch and tightened under his sternum.
He did not stop.
Stopping was stillness.
Stillness was execution.
Inhale—one.
Exhale—one.
The count shortened because the corridor's controlled quiet was wrong. It made the body want to believe the space was safe even while teeth were inside him. The body's belief was the enemy.
He drove his weight forward anyway, dragging the hound with him for half a step, turning the bite into leverage. The animal's paws skittered on slurry. Claws scraped for purchase. The pull weakened for a heartbeat.
Mark used the heartbeat.
He dropped his center and brought the buckler rim down in a compact strike toward jawline. Not a wide swing. Wide meant rib torque and shoulder extension, and his left shoulder did not lift cleanly anymore. He kept the buckler close and let body weight do the work.
Metal met bone and muscle.
The impact traveled through the strap and into the burn on his left forearm. The burn flared bright, a precise line under bandage. The shoulder protested in delayed pain, unstable and loud.
The hound's teeth slipped out of flesh.
Blood followed it.
Warm wetness ran down the back of Mark's calf and met ash-lime powder residue from the wash area. The powder turned it to paste. Paste would dry. Dry would crack. Crack would pull skin with every step.
Refills didn't put skin back.
Refills didn't make tendons whole.
He had learned that with ribs and shoulder and burn and hand.
The leg was joining them.
The second hound came in at the moment the first let go.
Not from the front.
From the side.
Low and fast, aiming for the ankle, aiming to steal the foot now that the knee had been tagged.
They were not hunting as two separate animals.
They were hunting as a pair.
Mark's right palm tightened on the sword hilt.
The cloth wrap was damp with sweat and blood. Damp meant slide. The hilt rotated a fraction in his compromised grip. A warning.
Warnings killed.
He corrected the rotation with a micro-adjustment and chose a thrust rather than a slash. A thrust was less arc, less reliance on perfect hold, less time in air.
He drove the point low toward the second hound's forepaw, aiming where tendon met bone.
The point clipped fur and scraped claw.
Not deep.
Enough to make the line break for a fraction.
Mark stepped through the fraction and put the wall ribs on his left side. Walls were limits on angles. Angles were what hounds used to steal legs.
His breath count tightened again.
Inhale—two.
Exhale—two.
He forced it back to that cadence because the drain had begun to climb in the space between impacts, when the corridor's lamplight stayed steady and the building felt like it was doing its work without hurry.
The corridor widened ahead into a cleaner service stretch—less straw, more bare stone, with iron grates along the edges that breathed warm air up in steady waves. Furnace-adjacent. Ash smell. Metal scent.
Heat and ash could cut scent.
Not erase it.
Change it.
Behind him, claws scraped. The pair stayed close enough to count as threat. Threat kept the drain from free-falling. Threat also threatened to end him if one bite seated again.
That geometry—close enough, not touching—was the only survivable line.
Mark moved down the center lane for two steps, then shifted to the rougher stone near the left ribs. The center looked clean, but clean floors were lies. Clean meant polished. Polished meant slick when wet.
Wetness was everywhere here: water from wash channels, slurry tracked by paws, condensation near warm grates.
His compromised leg shortened stride on its own, refusing full extension. The knee wanted to stay slightly bent, protective. That protective bend shortened reach. Shorter reach shifted center of gravity. Shifted center made traction more expensive.
Traction was already compromised.
He compensated by keeping the compromised foot flatter and landing earlier, avoiding toe-first push-offs that strained the back of the knee.
The first hound lunged again, now smarter, aiming for the heel rather than the knee.
Mark did not lift the heel.
Lifting exposed it.
He slid.
He lowered his center and let the boot skim the stone in a controlled half-step, pivoting on slurry rather than fighting it. The slide was danger, but it was controlled danger. Controlled danger was still better than being held.
The hound's teeth snapped on air.
Mark answered with the buckler rim again, compact, catching shoulder line and redirecting the animal into the grates. Claws scraped iron. The hound recoiled, then surged back.
A whistle cut through the corridor.
One note.
Clean.
Not shouted.
The sound wasn't for Mark.
It was for the animals.
Mark's sternum tightened as the drain tasted the whistle's discipline. Discipline read like calm to the curse. Calm read like safety. Safety killed.
He refused the read by forcing noise.
He dragged the sword tip along stone for one breath—scrape—then lifted it.
The scrape was not intimidation.
It was survival.
He kept moving.
Ahead, a narrow service door stood cracked.
Not a seal door.
No etched square.
A staff door with a latch plate at chest height.
Mark didn't trust cracked doors. Cracked doors were options for people who could afford to choose. He could not afford to stand at a threshold and decide.
He shoved through sideways with buckler tucked and oil jar tight against his chest under cloth wrap. The oil jar thumped the frame. The schematic board bit his cracked rib again. Pain flared. Breath hitched. The drain tasted it.
He forced motion.
Inhale—two.
Exhale—two.
The room beyond was an equipment bay: leashes on hooks, a bin of straw, a barrel of water, a low shelf with wax-sealed jars, and a powder bin with its lid half-shifted as if used recently. The air stung with ash-lime bite. The floor was damp, cleaned often.
The hounds hit the threshold behind him and hesitated for a fraction, noses working, reading the room. The hesitation wasn't fear. It was procedure. They were deciding whether the corridor beyond was part of their hunt pattern or a boundary.
Mark didn't wait to find out.
He kicked the straw bin.
Not a dramatic explosion.
A controlled scatter into the doorway behind him.
Straw burst across damp stone and formed a loose layer. Loose straw on wet floor was slip.
Slip affected him.
Slip affected them.
The first hound stepped into the straw and skidded. Claws scraped and found less purchase. It corrected, but correction cost it a fraction.
Fractions mattered.
Mark used the fraction to cross the bay and push through the far door into a narrower corridor that smelled more like furnace heat and less like animals.
Warm air rose from grates.
Ash smell sat in stone.
Metal scent sharpened.
He could use this.
He could smear ash onto his trail and dull blood odor.
He could also use the corridor's long lines to manage distance.
Long lines were dangerous. They created the lie of space. Space could feel like safety.
Safety killed.
He did not sprint into the long line.
He kept short steps, kept breath count steady.
Inhale—two.
Exhale—two.
The compromised leg pulled at the bite site when he pushed off. Pain sharpened behind the knee. It wasn't the worst pain he had felt. It was worse in a different way. It changed how the leg behaved.
The joint did not trust extension now. Each step became a negotiation. Negotiations stole time.
Time killed.
The hounds regained traction behind him and entered the furnace-adjacent corridor.
Their noses dipped to the floor more often now. They were following a line Mark couldn't stop leaving.
Blood.
The ash-lime paste on his calf didn't hide it.
It made it stick.
He felt a cold clarity settle in his mind: masking wasn't one action. It was a repeating task. Repeating tasks cost time. Time was lethal.
He couldn't mask perfectly.
He could only corrupt.
He reached the next bend and saw a shallow ash gutter along the wall rib where soot had collected. Not a neat container. A natural accumulation where furnace breath deposited residue.
He dragged the compromised boot through the ash deliberately, coating the blood paste with soot. Then he did the same with the other boot, making his trail less clean.
Clean lines were easy to read.
Noise lines were harder.
The hounds hesitated a fraction when the scent changed.
Mark did not allow the hesitation to become a pause.
He tightened cadence.
Inhale—one.
Exhale—one.
Shorter, because the drain had begun climbing again in the space between lunges. The corridor's controlled lamplight and steady warmth tried to make the body believe it could endure without immediate danger.
Belief was the lethal part.
Mark forced threat.
He knocked the sword flat once against the wall rib as he ran—tick.
He kicked an iron fragment into a grate—clatter.
The sounds were small, but they were signals to his own nervous system: this was not calm.
The first hound lunged again, now aiming for the compromised leg with precision.
Not random snapping.
Targeted.
It went for the back of the knee a second time, trying to deepen the injury, trying to take hamstring function.
Mark felt it coming by the shift of air and claw cadence.
Traction + breath timing.
He planted the compromised foot early, flatter, and pivoted on it in a controlled slide rather than lifting. Lifting would expose the tendon line. Pivoting kept the leg low and reduced the bite angle.
It also threatened to topple him.
Topple meant stillness.
Stillness meant death.
He countered topple by dropping center lower and letting the buckler rim catch the hound's jawline again in a compact strike.
Teeth scraped iron.
The hound recoiled.
Mark used the recoil to thrust low with the sword point into the shoulder joint area—muscle and tendon, not bone—aiming to make the leg of the animal fail.
Not killing yet.
Slowing.
Slowing bought seconds.
Seconds mattered.
Blood appeared on fur.
The hound yelped and stumbled.
The second hound surged in from the side immediately, trying to capitalize on Mark's attention being split.
Mark's right palm tightened on the sword hilt again.
The wrap slipped.
The hilt rotated a fraction.
Grip uncertainty.
He corrected with micro-adjustment and chose another thrust instead of a slash, keeping the blade line tight.
The point grazed the second hound's paw again.
Not deep.
Enough to break line.
Mark stepped through the seam and kept moving.
He could not stand here and win cleanly.
Clean wins created quiet.
Quiet killed.
He needed to keep a threat thread attached while he found a way to keep his leg from being stolen completely.
He needed a door.
A door that would create an angle problem for the hounds.
A door that would force them to commit to a narrower line where he could manage bites with fewer steps.
The corridor ahead split into two.
One branch was cleaner and more maintained—likely a staff artery.
The other branch was rougher, lower ceiling, more heat—likely closer to furnaces and waste. Heat meant ash. Ash meant scent corruption. Low ceiling meant fewer lateral options.
Fewer lateral options was dangerous when your leg was compromised.
But fewer lateral options also meant fewer angles for bites.
Mark chose the rougher branch.
He entered it and felt the air thicken with heat. His sweat increased immediately. Sweat made cloth wrap damp. Damp made grip uncertain.
He adjusted by tightening the wrap around his palm with his teeth while moving, one more turn, binding cloth tighter to skin.
Pain flared where the puncture wound sat under pressure.
Pain stole a breath.
The drain tasted the hitch.
He forced motion through it.
Inhale—two.
Exhale—two.
The hounds followed into the rough branch.
Their claws sounded different on the rougher stone—more scrape, less slide. Better traction for them. Worse for him, because rough stone grabbed his boots and punished the compromised knee if he pivoted wrong.
He stayed flatter, avoided sharp pivots, used sliding only when slurry or soot allowed it.
The corridor narrowed and then opened into a small landing where a wash channel cut across the floor, not a deep channel, a shallow cut to carry runoff. The channel glistened with water and gray powder residue.
Mark saw opportunity and danger in the same line.
Water could make slip.
Slip could make hounds fall too.
If a hound fell, it lost line.
If it lost line, it lost bite angle.
If it lost bite angle, Mark could move without being held.
He used the oil jar again.
Not as a weapon.
As physics.
He loosened the cloth at the jar mouth with his teeth just enough to let a bead form. He let the bead fall onto the wet channel's edge where stone met water.
The bead spread fast on wet stone into a slick patch.
He sealed the jar immediately again, tightening cloth, keeping oil as resource rather than spill.
Then he stepped onto the edge of the slick patch with his good leg and let it slide a fraction, controlled. The slide carried him across the wash channel without needing a big step from the compromised leg.
Big steps tore.
Small controlled slides saved tendons.
The first hound hit the slick patch and skidded.
Claws scraped and found nothing.
The animal corrected, but correction cost it a step.
The second hound tried to avoid the slick patch by jumping sideways.
The jump landed it on the wash channel itself.
The channel was wet and powdered.
It slid too.
For a fraction, both animals lost perfect traction.
Fraction was seam.
Mark used the seam to end one.
He drove the sword point under the jawline of the closer hound as it regained balance, a tight thrust that didn't require a wide arc.
Blood.
Heat.
Refill.
The refill hit like a switch thrown behind his eyes. Breath opened. Tremor vanished. The world sharpened for a window. The cracked rib stayed cracked. The shoulder stayed unstable. The burn stayed alive. The bite wound did not close.
But alignment returned long enough for him to move with intention rather than survival blur.
He did not chase the remaining hound.
Chasing would create distance. Distance could become lull. Lull could become quiet.
Quiet would make the drain climb again, and now the leg wound meant he might not outrun the free-fall.
Instead he let the remaining hound stay behind him.
Close enough to be threat.
Far enough not to seat teeth.
A moving thread of danger he could use to keep his curse from killing him in silence.
The remaining hound circled, wary now. It had seen one of its pack end. It didn't flee. It tightened its line, waiting for the compromised leg to fail.
Mark could feel the leg's failure in the way his stride wanted to shorten even with the refill. The refill aligned stamina and focus, but it did not rebuild the tendon. The back of the knee still felt fragile. The knee still wanted to stay bent.
He moved anyway.
Inhale—two.
Exhale—two.
He left the wash channel landing and entered a narrower corridor where the floor was less wet and more gritty with soot. Better traction for boots. Worse air for lungs. Heat pressed up from below. The air tasted like metal and ash.
Ash helped scent.
Ash did not help breath.
Breath and traction were now in conflict.
He managed both by keeping the pace steady rather than fast.
Fast would spike breath demand and rib pain.
Slow would invite quiet.
He used the hound behind him as a metronome for threat. If the hound slowed too far, the drain would climb. If the hound surged too close, the leg would be taken.
He adjusted the distance by sound.
Claws too quiet meant he needed to make noise.
He struck the wall rib once with the sword flat—tick.
Claws too close meant he needed to change angle.
He took a shallow turn around a rib protrusion, forcing the hound to widen its arc.
Widening arc cost it a fraction.
Fraction bought space without widening into lull.
The corridor ended at another staff door.
This one was half-open, as if used recently.
Warm air spilled from it.
Not the warm air of safety.
The warm air of bodies.
Mark's lungs eased because human scent meant human intent nearby. Intent fed the curse the right way.
But human intent also meant professional control.
Professionals were worse than hounds because professionals could choose not to feed him kills.
They could hold him alive in quiet.
He didn't have time to decide whether to enter.
He entered.
He shoved through sideways, buckler tucked, oil jar tight, sword low.
The room beyond was not a full hall.
It was a narrow passage between storage cages: metal racks, stacked leashes, bundles of straw, and a trough with water that reeked of disinfectant.
No people visible.
But the air held them.
Human sweat.
Leather.
Oil lamp smoke.
Somewhere nearby, a handler was close.
The remaining hound followed to the threshold and hesitated again, nose working.
Mark used the hesitation to shift his weight and test his compromised leg.
He tried to extend the knee fully.
It refused.
Not completely.
But enough.
The back of the knee pulled and a sharp pain flashed. The leg stayed slightly bent, protecting itself.
A slight bend was a permanent change in function.
A slight bend meant every step from now on would be shorter unless he forced it.
Forcing it risked tearing.
Not forcing it risked slow speed.
Slow speed risked quiet.
Quiet risked drain.
He could feel the chain of consequences as pressure in the chest.
Not thought.
Physics.
He didn't let the chain become panic.
Panic was breath theft.
Breath theft was drain.
He forced procedure.
Inhale—two.
Exhale—two.
The hound behind him growled low, uncertain whether to cross into the disinfectant scent and tight racks.
Mark didn't wait for it to decide.
He moved through the storage passage and out the far door, keeping the corridor hostile enough that the hound would either follow or be replaced by a human team that would keep threat present.
He needed threat.
He needed it controlled.
He needed it now more than ever because the leg had become a vulnerability that could end him with one more mistake.
Behind him, the hound's claws finally crossed the threshold.
It had committed.
It was still there.
Threat stayed attached.
The drain eased by degree.
The corridor ahead sloped slightly downward and the air cooled a fraction. The smell of animals faded. The smell of metal sharpened.
He wasn't out.
He was only moving into the next system.
But he carried something new inside his body that the fortress had installed with teeth.
A leg that no longer trusted full extension.
A knee that stayed bent.
A stride that shortened.
He kept moving anyway, because in this place, any part of him that wanted to rest became an executioner.