The first night was cold.

  Not temperature-cold. The Basin's air held warmth like a blanket, thick with qi that kept the ambient temperature above freezing even after the three-layered sunset painted the canopy in colors that shouldn't exist together. The cold was internal. Something in the Brown-Tooth's dying body losing heat faster than the environment could replace it. Entropy with a schedule.

  He'd found shelter. A gap between roots at the base of one of the massive trees, where the trunk split into three directions and left a hollow the size of a large dog. He'd dragged himself into it an hour before dark, back half scraping across bark and soil, leaving a trail any predator with functional nostrils could follow.

  The trail bothered him.

  Not emotionally. Practically. He couldn't stop leaving it. The ruined back half leaked fluid with every movement, and the Brown-Tooth's crude qi channels didn't have enough energy to close the wounds at the compression line. Every time he moved, he advertised.

  So stop moving.

  The thought arrived with the flat authority of someone who'd managed outdoor work sites in winter. When conditions are bad, you don't push. You shelter, you conserve, you wait for the situation to change or for a solution to present itself.

  He hunkered into the root hollow, tucked the two functional front legs under the body, let the middle pair brace against the wood, and stopped.

  Silence. Not true silence. The Basin didn't do silence. Wind through the canopy above. The hum of crystallized qi veins in the tree bark, faint and constant, like a refrigerator running in the next room. Something calling in the distance, a sound that started as a bird and ended as something that wasn't. Clicks and rustles from the underbrush, other Brown-Tooths emerging from their burrows now that the insane predator in the clearing had apparently left.

  He watched them through one open eye.

  Three of the creatures picked through leaf litter twenty feet away. Same species, same brown scales, same oversized teeth. They moved in a coordinated scuttle that used all six legs in a rolling gait, front pair reaching, middle pair pushing, back pair stabilizing. Fast. Efficient. The body he was wearing had been built for that gait, and he was using it like a shopping cart with two wheels missing.

  The three Brown-Tooths found something in the leaf litter. A patch of moss growing on a rock. They bit into it with their oversized teeth, grinding with a circular jaw motion that reduced the moss to paste before swallowing.

  His body responded.

  Not hunger. The stomach was gone. But the mouth watered anyway, the salivary glands in the Brown-Tooth's jaw firing on at the sight of food being consumed. Muscle memory. The body remembered eating even if the body could no longer eat.

  He watched the Brown-Tooths finish their meal and skitter away into the underbrush. He watched the moss on the rock, torn but already regrowing at the edges, fed by the qi-dense air.

  Then he looked at his own midsection. At the compression line where his body ended and the paste began. At the shimmer, barely visible in the fading light, where the spatial fold had left its crease.

  The stomach was on the other side of that crease. In the Echo layer. Three to ten feet below the Surface, according to a knowledge he didn't know he had. The food would need to cross the boundary to reach what was left of his digestive system.

  But food didn't cross spatial boundaries. Food was a physical matter. Physical matter stayed in its own layer unless forced through a thin spot.

  Unless the food was already IN both layers.

  The moss.

  He turned his one open eye back toward the rock where the Brown-Tooths had been feeding. The moss grew on the surface, green and thick. But at the edges of the rock, where the stone met the soil, a different kind of growth caught the fading light. Thinner. Paler. Almost translucent at the tips, as if the plant couldn't decide how solid it wanted to be.

  He dragged himself toward it.

  Twenty feet. The scraping sound of his back half against the forest floor was louder in the quiet. Every Brown-Tooth in earshot went still, then bolted. He ignored them.

  The moss at the rock's base was different from the moss on top. He pressed his nose against it. The Brown-Tooth's olfactory system, crude but functional, reported two things. The sharp green smell of plant matter, and beneath it, something else. A faintness. An incompleteness. Like smelling half a flower.

  The other half was in the Echo.

  He could perceive it. Not with the Brown-Tooth's eyes or nose. With something underneath, something that belonged to HIM rather than the body. His form awareness, faint and limited in this crude vessel, could feel the spatial boundary running through the moss like a fault line through bedrock. The plant grew across the seam. Roots in the Echo, fronds on the Surface. It existed in both layers simultaneously.

  Cross-layer moss. A weed, probably. The Basin equivalent of the dandelion that grew through sidewalk cracks. Something so common nobody thought about it.

  He bit into it.

  The Brown-Tooth's teeth were built for this. The oversized incisors ground through the moss with the circular jaw motion he'd watched the others perform. The taste was bitter, mineral, with an undertone of something electric. Not pleasant. Not terrible.

  He swallowed.

  The moss hit his throat. Descended. Reached the compression line where his upper body met the spatial fold and…

  Didn't vanish.

  Because the moss was already in both layers. The portions existing in the Echo passed through the fold seamlessly, arriving in the crushed remains of his lower digestive system. The Surface portions dissolved at the boundary, releasing their stored qi into the channels around the compression line. Not nutrition in the traditional sense. But energy. A trickle of fuel into a system running on fumes.

  He ate more.

  Not gracefully. The jaw worked in clumsy jerks, biting off too much, grinding unevenly, swallowing in chunks that caught at the diaphragm before the cross-layer portions slid through. His body rejected half of it. He ate more anyway.

  An engineer would have called it an elegant solution. Find a material that exists in both layers, use it to bypass the boundary, feed the portions of the body that can't be reached through normal means.

  He didn't call it anything. He just ate until his jaw ached and the trickle of qi from the dissolved Surface-portions stabilized the front half's declining energy reserves.

  Then he crawled back to the root hollow, tucked himself in, and lay still.

  The three suns had set. One layer of sky showed stars. Another showed a faint amber glow, the Echo's permanent twilight bleeding through a thin spot overhead. The third, visible only as a brief flicker between the other two, showed absolute darkness. The Deep layer. No light reached the Deep.

  He closed both eyes.

  Sleep didn't come. Brown-Tooth's brain wasn't structured for the kind of sleep he expected. It ran on a cycle of alertness and torpor, never fully unconscious, always partially monitoring the environment through vibrations in the ground transmitted up through the legs.

  He lay in the dark, half-torpid, half-aware, and the fragments came.

  The smell of the moss had triggered something. Green. Growing. The specific act of putting something in a mouth and chewing and swallowing. The sequence was older than whatever he'd been before this, as fundamental as breathing. But layered underneath the mechanical act was something else. A table. Not the image of a table. The FEELING of a table. The sensation of sitting at a surface with food in front of him and other people nearby.

  Other people.

  The fragment pulsed and went dark. No faces. No voices. Just the shape of companionship during a meal. The warmth of not eating alone.

  He was eating alone. He was a dead lizard eating weeds in a hole. The contrast between the fragment and the reality was so vast it should have been devastating, but the devastation required a framework he didn't have. You couldn't grieve what you couldn't remember. You could only feel the gap where the grief would go, the way a missing tooth leaves a space the tongue keeps finding.

  The narrative has been illicitly obtained; should you discover it on Amazon, report the violation.

  His jaw clicked in the dark. Reflex. The Brown-Tooth's threat-call, triggered by stress. Click-click-click.

  He clenched the jaw shut before the sound could carry.

  Morning came in layers.

  The Surface sky lightened first, pale blue bleeding into gold as the sun climbed above the rim mountains. The Echo's amber glow dimmed to near-invisibility, overwhelmed by the stronger light. The Deep remained dark. Always dark.

  He emerged from the hollow and took stock.

  The body was worse. The rot had advanced three inches past the compression line overnight, the dead tissue of his back half creeping forward into the living front. The smell was bad. Another day, maybe two, and the decay would reach the front pair of legs. After that, the crude qi channels would fail. After that, whatever held his awareness inside this body would lose its grip.

  Two days. Maybe three.

  He needed to find a better body before this one fell apart.

  The thought should have been alien. Should have carried the weight of its own horror. He was thinking about discarding a body the way you'd think about trading in a car with a blown transmission. Find a newer model. Transfer the registration. Drive away.

  The horror didn't come. Not because he was incapable of it. Because the part of him that would have been horrified was buried under the part that was counting hours and measuring rot advancement and calculating how far the Brown-Tooth's remaining legs could carry him before the decay reached them.

  Construction triage. The building is falling down. You don't mourn the building. You get the people out and find a new site.

  He started crawling.

  The forest was different in the morning light. The qi-crystal veins in the tree bark caught the sun and threw prismatic reflections across the undergrowth. Insects, or things that served the function of insects, moved through the leaf litter in patterns that suggested a social hierarchy more complex than anything he'd expect from creatures the size of his teeth.

  And the spatial folds were visible.

  In daylight, with the Brown-Tooth's peripheral vision spread across 300 degrees, he could see them. Creases in the air. Lines where the light bent slightly, where shadows fell at the wrong angle, where the ground appeared to exist twice, the second version offset by a few inches. The Echo layer, bleeding through.

  The folds were everywhere.

  Not large ones. Not the kind that had killed the Brown-Tooth he was wearing. Small folds, hairline thin, running through the forest like cracks in old plaster. Stable, mostly. The edges didn't shimmer the way the compression crease did. They just sat there, part of the landscape, the way potholes are part of a road.

  He navigated around them by instinct. The Brown-Tooth's body knew the folds. Its remaining legs avoided the thin spots with a sure-footedness that came from generations of evolution in spatially unstable territory. The body had lived its entire life in a world where the ground might not be where it looked, and its nervous system was calibrated accordingly.

  He was grateful for the body's competence, because his own sense of direction was garbage. The panoramic vision still wouldn't merge properly. He kept one eye closed and moved in a lopsided crawl that favored the left side, where the remaining middle leg still had partial function.

  Two hours of crawling brought him to the edge of the forest.

  The tree line ended at a shelf of exposed rock that dropped away into a valley. Below a river, wide and slow, cutting through a landscape of mixed forest and open ground. The water caught the triple-layered sunlight and threw it back in colors that shifted depending on which eye he used.

  And there, at the river's edge, moving upstream in a line of eight, were people.

  People.

  He pressed himself flat against the rock and watched through one eye.

  They were too far away for Brown-Tooth's vision to resolve details. Shapes, human-sized, moving in formation. The front one held something that pulsed with a light the Brown-Tooth's eyes couldn't process properly. Spiritual energy. A technique or a tool, projecting ahead of the group like a lantern.

  Behind them, a larger shape. An animal, loaded with packs. Supply beast. The group was traveling, equipped and organized.

  Cultivators.

  The word arrived from the knowledge the golden sphere had pressed into him. Cultivators. People who absorbed the ambient energy of the world and used it to strengthen their bodies and extend their lives and do things that violated the laws of Heaven.

  The body he was wearing couldn't cultivate. But a cultivator's body could.

  He watched the group move upstream and disappear around a bend in the river.

  More would come. This was a route, a path through the outer forest, used by people heading deeper into the Basin. Where there were routes, there were travelers. Where there were travelers, there were accidents. Spatial folds. Beast attacks. Falls.

  Deaths.

  He needed to be close to where people died.

  The thought sat in him without moral weight. Not because he was amoral. Because the part of him that processed ethics required context, required memory, required a framework of right and wrong built from a lifetime of human experience, and that framework was fragments. Shards without mortar. He knew "wrong" existed. He couldn't locate it on the map of his current situation.

  A dead lizard eating weeds needed a better body. Bodies came from the dead. People died near the routes. Therefore go to the routes.

  The logic was clean. The logic was horrifying. He couldn't see the horror yet.

  He would.

  He turned away from the cliff edge and began dragging himself along the tree line, parallel to the river below, following the route the cultivators had taken.

  The scraping sound of his back half followed him. Constant. Wet. The metronome of a body counting down its own expiration.

  He'd covered perhaps three hundred feet when the ground beneath him vibrated.

  Not from his own movement. From below. From the Echo layer. Something moving down there, something large enough that its passage through the sub-surface sent tremors up through the spatial boundary into the Surface where his remaining legs were planted.

  He stopped.

  The vibration came again. Closer. The direction was wrong. Not approaching from ahead or behind. From directly underneath. Whatever was moving in the Echo was tracking along the same path he'd taken.

  Following his trail.

  The rot. The fluid he'd been leaving behind. The trail of decay that leaked from his compressed back half with every foot of distance covered. On the surface, it was a thin smear of biological waste. In the Echo layer, three to ten feet below, that same waste was dripping through the spatial boundary at every thin spot and fold he'd crossed.

  He'd been leaving a trail in two dimensions.

  The vibration stopped.

  Directly below him.

  The Brown-Tooth's body locked. Every remaining muscle froze in the specific rigidity of prey that has realized, too late, that the predator was never behind it. The predator was beneath the floor.

  A thin spot, six feet to his left, began to bulge.

  Not break. Not tear. The spatial boundary between the Surface and the Echo layer stretched upward like a membrane being pushed from below. Something was pressing against the underside of reality, testing the barrier with a pressure that made the surrounding air taste like copper.

  He couldn't run. Two working legs and a dragging corpse-half. The three hundred feet to the cliff edge might as well have been three hundred miles.

  The bulge expanded. The thin spot's shimmer intensified, the boundary between layers going from translucent to nearly opaque as something dark moved behind it, huge in silhouette, its outline distorted by the spatial compression.

  The Brown-Tooth's jaw clicked. Involuntary. The threat call broadcasting into the quiet morning air like a dinner bell.

  Click-click-click.

  The bulge stopped expanding.

  Silence. The kind of silence that had weight, that pressed against the ears, that meant something large and patient was deciding whether the noise above it was worth the effort of breaking through a spatial boundary.

  He clenched his jaw shut. Held it. The Brown-Tooth's body trembled, every crude qi channel firing with the useless panic of a system that had evolved to flee and couldn't.

  The bulge held for ten heartbeats.

  Then it receded. Slowly. The membrane settling back to flat, the shimmer fading, the dark silhouette beneath sliding away in a direction that didn't correspond to any compass point on the Surface.

  Gone? Or circling?

  He didn't move. Didn't breathe. The body's torpor instinct had engaged fully, shutting down everything non-essential, channeling every scrap of remaining qi into keeping the core organs alive and the limbs locked in place.

  Playing dead.

  He was already dead. The body was already dead. He was a dead thing inside a dead thing, pretending to be more dead than he actually was, and somewhere beneath the floor of reality something was hunting by smell in a dimension he couldn't see.

  Minutes passed.

  The vibrations didn't return.

  He waited longer. The sun climbed. The forest sounds resumed. The Brown-Tooths in their burrows emerged cautiously and went back to foraging.

  When he finally moved, it was slow. Careful. One leg at a time. The scraping of his back half against the rock sounded louder than a scream.

  He headed for the cliff edge. Not toward the route anymore. Away from the trail he'd left. Away from the thin spots that let his waste drip into the Echo. Away from the thing below.

  The cliff offered exposed rock where fluid would evaporate in the sun instead of seeping through spatial boundaries. Worse shelter. Worse food access. But a surface that didn't leak his position into a hunting ground he couldn't see.

  He reached the cliff edge and pressed himself flat against a warm stone.

  The warmth hit him.

  Sun-heated rock against his belly scales, radiating through the Brown-Tooth's body into the crude qi channels. Warm. Solid. Present.

  Something detonated in his chest.

  Not pain. Not thought. A physical response so total and so contextless that it bypassed every filter and hit the raw, unprocessed center of whatever he was. The sensation of pressing his body against something warm when the world was too big and too cold and he was too small and too scared and the ONLY THING that helped was the heat of something solid against his skin.

  He'd done this before. Not in this body. Not in this world. In a room with machines that beeped and a smell like hand sanitizer and plastic and something small, so small, wrapped in cloth with a tube in its nose, and he'd pressed his hand against the glass and the glass was warm from the incubator lights and the warmth was the only connection he could make because they wouldn't let him hold her yet, not yet, she was too…

  The fragment shattered.

  Gone. No face. No room. No name for the small thing in the incubator. Just the warmth against his belly and the aftershock of something enormous that had passed through him and left without explaining itself.

  The Brown-Tooth's jaw clicked once. Soft. Not a threat call.

  Something else. Something the creature's limited vocal apparatus didn't have a category for. A sound that meant nothing in the Brown-Tooth's language because the Brown-Tooth's language didn't have a word for the specific, stupid, unearnable grief of a man who couldn't remember what he'd lost but could feel, against warm stone on a cliff in a broken world, exactly how much it had weighed.

  He lay on the rock.

  The sun moved across the layered sky.

  Below the cliff, in the valley, the river flowed in two directions at once.

  Below the river, in the Echo, something patient was still hunting.

  And above it all, a crippled lizard pressed against warm stone, running out of time, running out of body, two days from dissolution and no closer to survival than the moment he'd crashed through the sky like a spark landing on snow.

  Nobody noticed.

  But something below the ground was learning his smell.