The corridor he'd chosen sloped downward, which was probably a mistake. Every survival heuristic he'd internalized from colony life told him that descending through an unfamiliar structure reduced your options, because gravity was consistent and the things trying to kill you generally weren't. But the other corridors had offered worse prospects. One led toward whatever was breathing in the junction. The rest carried vibration patterns that reminded him of the Sea's tidal cycling, suggesting the nanobot suspension had flooded those sections and hadn't fully receded.
So downward it was.
The Covenant interface sat in the corner of his visual field like an uninvited guest, displaying data he hadn't requested. His modification tier, which it listed as Initiate. His active capabilities, presented as a short index he could expand by focusing on individual entries. His Flaw status, noted with the same clinical indifference it applied to everything, as though the fact that every signal his tap produced now registered as fraudulent was simply another parameter worth tracking.
Sunny expanded the capability index while he walked, because the alternative was walking in the dark with no understanding of what the AI had written into him.
The spatial awareness he already knew about. It had been running since the moment the modification activated, translating vibration and pressure data into a spatial model that assembled in his mind without visual input. The Covenant's description was sparse: enhanced environmental modelling through substrate vibration analysis and pressure differential mapping. Range scaled with substrate conductivity and atmospheric density. It didn't explain how the modification achieved this. The Covenant didn't explain things. It listed them.
The second entry was labelled LIGHT REFRACTION (PARTIAL). Active bending of visible-spectrum light around the user's position. Low-light environments only. Produces significant visual distortion at close range. Does not achieve full optical invisibility. The description noted that the distortion improved as ambient light decreased, which meant the Dark Cradle's frequent blackout conditions would turn the capability into something approaching real stealth.
He tried to activate it. The sensation was immediate: a tension that originated somewhere in his skin and radiated inward, uncomfortable but not painful, and he could feel it drawing on a reserve the Covenant tracked with a small indicator he hadn't noticed before. The indicator was ticking down. He couldn't see the effect, because there was no light in the corridor to refract, but the Covenant confirmed the state change. He deactivated it after a few seconds and the tension released.
The third entry stopped him walking.
NANOBOT COMMANDEERING. The description was longer than the others. The Shadow Remnant's genetic modification provided a unique interface with the user's nanobots, allowing dynamic redistribution at processing speeds no conscious operator could match. Concentration around the body increased physical durability and striking power. Concentration around a weapon hardened its striking surface and optimized force transfer. Concentration around armour increased damage absorption. Enhancement was roughly double baseline effectiveness. Limitation: concentration could only be applied to one location at a time.
Sunny didn't have a weapon. He didn't have armour. He had a maintenance coverall and a multi-tool. He tried the body enhancement anyway, focusing on the entry the way he'd focused on the light refraction.
Something moved under his skin.
Not painfully or even unpleasantly. But he could feel the nanobot layer that he knew every Sleeper carried as baseline structural reinforcement shift in response to something that wasn't his conscious input. The nanobots concentrated around his forearms and hands first, then redistributed across his torso, and the sensation was like putting on a second skin that was denser and harder than the first. His grip strength increased enough that when he squeezed his own wrist as a test, the pressure registered through the Shadow Remnant's spatial sense as significantly above what his unmodified musculature should have produced.
Then the concentration shifted without him telling it to.
The nanobots pulled away from his torso and cycled through his legs and arms before settling into an even distribution that felt like a resting state. The transitions happened fast, faster than he could have directed them consciously, and the timing of each shift carried a quality he could only describe as opinionated. The redistribution didn't feel random. It felt like something was testing configurations and forming preferences about which ones it liked.
Sunny stood in the dark corridor and processed the implication. The Covenant's description had said "processing speeds no conscious operator could match," which he'd read as a technical specification. He was now revising that reading. The system managing his nanobot redistribution wasn't just fast. It was making decisions. It had redistributed his enhancement layer across four different configurations in the space of a few seconds, and each transition had carried a distinct intentionality that felt less like an automated process and more like someone rearranging furniture in a room they'd just moved into.
Something in the back of his awareness pulsed. It arrived fully formed through a channel he didn't recognize, falling somewhere between a thought and a physical sensation, and the content was unmistakable even though it carried no words.
It was impatience. Directed at him. Because he was standing still in a corridor doing nothing while it was trying to calibrate.
"What the hell," Sunny said, very quietly, to no one.
The pulse repeated. This time it carried something closer to exasperation, and a micro-impulse flickered through his tap's overlay, highlighting the capability index in a way that suggested he should stop talking and start moving.
The AI had written a modification into his genome that included a semi-autonomous processing agent, and the processing agent had opinions.
Sunny filed this information in the category of things he was going to think about later, when he wasn't standing in a dark corridor inside a derelict station that predated human civilization while something with an attitude problem lived in his nervous system. He started walking again. The presence in his awareness settled into something that felt like grudging approval.
The corridor levelled out and widened into a large compartment. The air moved in complex patterns that suggested multiple ventilation sources, and the temperature had dropped enough that he was grateful for the dead Sleeper's jacket.
His spatial sense caught something at the compartment's far edge. A shape, pressed against the wall above the deck, clinging to the surface the way an insect clings to a ceiling. Its body produced a vibration signature that was fast and irregular, nothing like the mechanical rhythms of the station's infrastructure, and its surface texture read as segmented and chitinous, unmistakably organic.
Sunny stopped walking.
The shape hadn't moved. It was oriented away from him, limbs splayed for grip, and it could have been sleeping or resting or simply waiting in the way that predators in enclosed environments waited: patient and still, conserving energy until something worth chasing entered their range.
His heart rate spiked.
Between him and the organism, open decking and a pair of structural columns. The compartment's exit was a wide passage on the far side, past the organism's position on the wall. He would have to move close to reach it.
The presence in his awareness stirred. A sensation arrived that wasn't quite a suggestion and wasn't quite a command, but carried the unmistakable quality of someone who had assessed a situation and formed a strong opinion about the correct response. The nanobot layer around Sunny's body shifted without his input, pulling concentration toward his legs and core in a configuration that his modification recognized as optimized for quiet movement.
The subroutine wanted him to sneak past.
Sunny activated the light refraction. The tension bloomed in his skin, and the energy indicator began its slow decline. He couldn't see the effect, but in the near-total darkness of the compartment, the refraction would smear his outline into something indistinct, difficult to track by anything that hunted by sight.
He moved toward the columns. Each foot landed deliberately, rolling from heel to toe the way he'd learned in colony maintenance shafts where noise discipline mattered, and the Shadow Remnant fed him continuous data on his own acoustic output so he could adjust. The subroutine had shifted the nanobot layer to dampen the vibration his footsteps transmitted through the decking, which was a trick he hadn't asked for and wouldn't have known to request.
He reached the first column and pressed his back against it. The organism hadn't moved. His spatial sense tracked its position continuously, the fast irregular vibration pattern unchanged.
He edged around the column and moved toward the exit. The subroutine managed the nanobot distribution in real time, shifting concentration between his feet and his legs as his weight transferred, keeping the vibration dampening precisely where it needed to be at each phase of his stride. The coordination was better than anything he could have achieved through conscious effort.
Close to the exit, his foot caught a piece of debris on the decking. Something small and metallic that shifted under his weight with a scrape that his spatial sense registered as startlingly loud.
The organism's vibration signature changed.
The irregular pattern snapped to something focused and directional, and Sunny felt it rotate on the wall, reorienting toward the compartment's interior. Toward him.
He didn't run. The subroutine flooded his awareness with a proprioceptive command so clear it might as well have been shouted: don't move. He went still and suppressed his breathing to shallow draws through his nose while the light refraction bent what little ambient light existed around his position.
The organism held its new orientation. Sunny's spatial sense read its body in sharper detail now: a central mass supported by heavy limbs that terminated in gripping structures, and a forward section packed with what he interpreted as sensory tissue. It was scanning the compartment. He could feel it through the Shadow Remnant as a change in air pressure near his face, as if the organism was projecting something into the space between them and reading the returns.
Echolocation. Or something close to it, adapted for interior architecture.
The light refraction bent visible light. But the organism wasn't looking for light. It was looking for a physical presence in space, and Sunny was still physically present, standing close to the exit with his back rigid and his lungs burning.
The organism's sensory projection washed over him like a pressure wave. It moved past and continued across the compartment before returning.
The organism held its position for a few seconds. Then it turned back to the wall.
Sunny didn't understand why. He didn't know whether the light refraction had distorted his outline enough to read as structural geometry rather than biological presence, or whether the organism had simply decided that whatever it detected wasn't worth pursuing. The subroutine offered no insight. It was busy managing his nanobot layer and apparently considered his questions less important than its own calibration work.
He covered the remaining distance to the exit in careful steps and slipped through the opening.
He covered the remaining distance to the exit in careful steps and slipped through the opening.
Once around the corner he deactivated the light refraction and let himself breathe. The energy indicator had dropped a noticeable amount, and his hands were shaking badly enough that the tremor registered through the Shadow Remnant's vibration mapping. His legs felt like they'd been replaced with something less reliable than legs.
The Covenant had nothing to say about what had just happened, because the Covenant only cared about things Sunny killed, and Sunny had not killed that. The subroutine, however, pulsed something that felt distinctly like agreement with his decision to run, tinged with a suggestion that he should have been more afraid than he was.
He pushed off the wall and kept moving. The subroutine settled back into its calibration, cycling the nanobot layer through configurations with the focused intensity of someone who had been given a new set of tools and intended to understand every one of them before the day was over.
Sunny let it work. He had the feeling he was going to need it.