Seventy-eight was interesting.

  * * *

  The combat assessment had happened three days ago. Friday. The training hall configured for formal evaluation: the grid floor set to maximum sensitivity, recording every Flux output for later analysis. Drell presiding, her tablet logging scores. Students called one at a time for a three-minute solo combat assessment against calibrated training constructs: Flux-powered automatons that attacked at preset difficulty levels based on the student's registered Core grade.

  My constructs were set to C-grade difficulty. They attacked with the speed and power that a C-grade opponent would produce. They were calibrated to test a C-grade student's limits.

  They were not calibrated for what I'd become.

  Three weeks of Inversion Compression had changed the math. The technique was working. Each morning session with Suki produced measurable gains in Flux density. The reserves on my meter still read 97% because the meter's ceiling was calibrated to biological C-grade capacity and my actual capacity had exceeded that ceiling two weeks ago. I was operating at a density that the meter couldn't display, running Inversion Compression cycles that no biological cultivator could replicate, and the gap between what the instruments said and what I could do had widened from notable to absurd.

  The first construct attacked. C-grade speed, C-grade power. The strike was aimed at my center mass and I saw it coming through the Flux sense before the construct's limb moved, the energy building in its actuators broadcasting intention through the ambient field. I stepped. The construct missed. I countered with a Channeled strike that ran through five non-standard pathways and arrived at the construct's chassis with a density that cracked the outer casing.

  Drell's eyebrows rose. She made a note on her tablet.

  The second construct was faster. Still C-grade parameters, but the combat algorithm adapted to the student's performance, increasing difficulty within the grade band. The construct feinted left and struck right and the feint was visible through the Flux sense because the energy routing in the left actuator was a fraction of the routing in the right and the discrepancy was readable and I stepped inside the real strike and hit the construct in the joint housing and the joint shattered.

  Two constructs down in forty seconds. The assessment was scheduled for three minutes.

  The third construct was at the top of the C-grade band, approaching the threshold of D-grade difficulty. It attacked with a combination: two strikes and a grapple attempt. The strikes were fast enough that my body couldn't dodge both on physical speed alone. The Core's damage response prepared for the hit I couldn't avoid.

  But the hit I couldn't avoid didn't land. Because something happened that I hadn't done before.

  I channeled two operations simultaneously.

  The defensive Channeling activated on my left side: a Flux barrier forming across my ribcage to absorb the incoming strike. Standard. I'd been doing single-channel defense for weeks. What wasn't standard was the offensive Channeling that activated simultaneously on my right hand, a concentrated strike that I threw at the construct's exposed actuator while the barrier was still forming on my left.

  Two Flux operations. Running at the same time. Through separate channel pathways. Without interfering with each other.

  The barrier caught the construct's strike. My counter-strike destroyed its actuator. The construct stumbled. I hit it twice more and it went down.

  I stood in the assessment zone with three destroyed constructs and forty seconds remaining on the clock and the grid floor was bright with residual Flux and Drell was looking at her tablet with an expression I recognized from Varn on the first day of Compression class: the analytical frown of an instructor who'd seen something that didn't match the file.

  "Two simultaneous Channel operations," she said. "The grid recorded overlapping Flux signatures in your left torso and right hand. Concurrent, not sequential."

  "Is that unusual?"

  "For a C-grade, it's impossible. Dual-channeling requires the processing capacity of a B-grade Core at minimum." She looked at me. At the meter on my wrist. At the grid data on her tablet. "Your meter reads low-C."

  "Late manifestation. My channels are atypical."

  "Atypical doesn't explain dual-channeling from a C-grade Core, Vasik." But she was entering the score. The evaluation was structured: the constructs were destroyed within the time limit, the technique was effective, the power output was measurable. The score reflected performance, not explanation. She gave me a 78 and filed a note that I couldn't read from where I stood.

  The note, I learned later, said: Anomalous concurrent Channeling. Meter reads C. Performance reads B. Flag for semester review.

  * * *

  Suki was waiting for me outside the training hall.

  She'd watched the assessment through the hall's observation gallery. The gallery had a one-way transparency screen that let observers watch without Flux interference, and Suki had claimed a seat there an hour before my assessment slot and had not moved.

  "You dual-channeled," she said. She was standing in the corridor with her arms crossed and her braid over one shoulder and the expression on her face was the one I'd learned to classify as Suki at full processing power. Not angry. Not worried. Computing.

  "It wasn't intentional."

  "I know. Intentional dual-channeling produces a specific energy signature: the two operations are phase-locked, coordinated by the Core's processing center. Yours weren't phase-locked. They were independent. Two separate processes running through two separate channel groups without any coordination between them." She uncrossed her arms. "Your Core processed two operations simultaneously without allocating shared resources. That's not dual-channeling the way the textbook defines it. That's parallel processing."

  "Is there a difference?"

  "Dual-channeling is using both hands to do the same task. Parallel processing is two people working independently. One requires coordination. The other requires capacity. Bandwidth." She stepped closer. "Your Core has enough throughput to run two fully independent operations without a shared processing layer. That's not a B-grade capability, Renn. I don't know what grade that is."

  We were standing in the corridor outside the training hall. Students passed. None of them were listening because none of them cared about the assessment performance of a student ranked thirty-fourth out of forty-eight. The composite score was what they saw. The component breakdown was invisible unless you looked.

  Suki had looked.

  "The ranking board," I said. "The combat score."

  "Seventy-eight. Four points above B-grade average. From a C-grade student." She leaned against the corridor wall. The posture was casual. The intensity behind it was not. "Nobody's going to look at the component breakdown for someone ranked thirty-fourth. The composite buries it. You're safe."

  "For now."

  "For now." She looked at me. The computing expression softened at the edges. Not fully — Suki's softness was always partial, the analytical engine idling rather than shutting down. "The dual-channeling. The Inversion Compression. The damage mitigation protocol. These aren't C-grade capabilities. They're not B-grade capabilities. Whatever your Core is doing, it's operating outside the grade system entirely."

  "I know."

  "And whatever it is, it's still developing. You're not at ceiling. I can feel it during our sessions. Your density increases every day. The Inversion cycles are compressing harder. The channel capacity is growing." She pushed off the wall. Stood close. Close enough that I could feel her Core's output through proximity and see the fine detail of her face: the lashes, the dark eyes, the mouth that was set in a line that was trying to be analytical and was not entirely succeeding. "You're going to need to tell me what you are eventually."

  "I know."

  "Not today."

  "Not today."

  She held my gaze for three beats. Then she turned and walked toward the cafeteria and the braid swung and I watched her go and I was no longer pretending to myself that the watching was analytical.

  * * *

  I went to my room after dinner and sat on the bed and looked at the ranking board on my tablet. Thirty-fourth. The number was a mask, the same way the meter reading was a mask. Underneath the mask, something was growing.

  The dual-channeling had been involuntary. The Core had produced the capability without my conscious direction, the same way the damage mitigation protocol operated without conscious input. The synthetic Core was developing features. Evolving. Building new processing pathways in the channel network that expanded its capabilities beyond what the original prototype specifications described.

  Integration 2. The word came from Jo's data chip, which I'd read in its entirety during my first week at Aurelius. Jo's notes described the prototype's projected development path: a series of Integrations in which the synthetic Core would develop new processing capabilities as it adapted to its host's channel system. Integration 1 was basic Flux processing — the activation, the circulation loop, the channel filling. Integration 2 was projected to be multi-channel processing: the Core developing parallel operational pathways.

  The dual-channeling was Integration 2 beginning.

  I opened the data chip's files on my tablet. Jo's projections for Integration 2 included a timeline: six to twelve months post-activation. I was at three and a half weeks.

  The timeline was wrong because the projections were based on the first thirty-six prototypes, all of which had failed, and the models had been built on incomplete data. Jo hadn't known what a successful prototype in a Hollow physiology would do because it had never been done before. Her projections were educated guesses and the guesses were conservative and the reality was accelerating past them.

  I closed the file. The meter on my wrist read C — LOW. Somewhere underneath the reading, the Core hummed at a density that was climbing by the hour, building processing pathways that the grade system had no framework for.

  Thirty-fourth out of forty-eight. The safest number on the board. The most invisible position.

  The combat score was 78. Drell's note was in the system. The semester review was ten weeks away. Ten weeks of the gap widening. Ten weeks of the Core developing capabilities that the Academy's instruments couldn't measure and the grade system couldn't classify.

  Ten weeks of not being interesting.

  I turned off the tablet. I lay in the dark and felt the Core circulate and the channels refine and the Flux return denser with every cycle and the ceiling, wherever it was, was still invisible and the growth had not slowed and the numbers on the ranking board were lies and the lies were keeping me alive.

  The door was locked. Nobody came.

  The reserves hit 98%.

  * * *

  Chapter 11: Hands

  Petra's second full scan took two hours.

  The first scan, the forty-five-minute baseline, had mapped the broad strokes: major meridians, channel diameters, Core placement, Flux density distribution. She'd recorded the data on her personal tablet and kept it off the Academy records and neither of us had discussed why. The first scan was the survey. The second scan was the excavation.

  She'd sent me a message on the comm unit at 9 PM on a Tuesday: Come to the medical bay tomorrow after afternoon practicals. I want to run a follow-up. Bring water. It takes a while.

  I arrived at 4:15 PM. The medical bay was empty. The other clinical rotation students had finished their shifts, the afternoon injury wave had been processed, and the space was quiet in a way it never was during operating hours. The four beds were clean. The equipment hummed at idle. The antiseptic smell was present but diluted, easier to handle than the first visit because the associative panic had dulled through repeated exposure. The lab's smell was in my past. This smell was becoming something different. This smell was becoming Petra's.

  She was sitting on her stool beside the third bed, tablet in her lap, her auburn hair tucked behind both ears. She'd changed from the clinical uniform into civilian clothes: a soft grey sweater that was too large for her, the sleeves pushed up to her elbows, dark leggings. The sweater made her look smaller than the uniform did, which was an achievement given that she was already the smallest person I saw on a daily basis. The collar was wide and it had slipped off one shoulder, exposing the curve from her neck to her shoulder joint, and the skin there was pale and smooth and scattered with the same light freckles that crossed her nose.

  "Sit," she said. "Shirt off."

  The instruction was medical. The context was medical. The fact that my pulse rate climbed from 62 to 71 at the words "shirt off" was not medical.

  I sat on the bed. I pulled my shirt over my head. The scars were visible: thirty-seven lines, some surgical-clean, some ragged, crossing my chest and wrapping around my sides to my back. The longest one ran from my left collarbone to my sternum. The shortest was a two-inch mark below my right nipple where prototype nine had been inserted and rejected in the same afternoon.

  Petra looked at the scars. She'd seen the tops of them before: the collar line, the edges visible when my training shirt shifted during healing sessions. She hadn't seen them all. The full map. Thirty-seven installations documented on skin in a language that didn't require Resonance to read.

  Her expression didn't change. The green eyes moved across my chest with the same methodical attention she applied to Resonance scans: systematic, thorough, reading the data. But her throat moved. A swallow. The involuntary response of a person processing something that exceeded the clinical framework.

  "The scars are from the procedures I mentioned," I said. "The home cultivation was... intensive."

  "These aren't cultivation scars." Her voice was quiet. Steady, but quiet. "Cultivation injuries produce tissue damage along meridian lines. Burns, ruptures, channel collapse. These are surgical. Precise entry points along the sternum and intercostal spaces, consistent with implantation procedures." She looked at me. "You don't have to tell me what they are. But please don't tell me they're from home cultivation."

  I was quiet for a moment. The medical bay hummed around us. The equipment at idle, the Flux infrastructure in the walls, the faint ambient noise of a building that was alive with energy.

  "They're from procedures," I said. "Thirty-seven of them. Over twelve years."

  "Thirty-seven." She repeated the number the way she'd repeated "unusual" during the first healing session: absorbing the data, filing it, deciding what to do with it. "Starting when?"

  "Age six."

  The green eyes held. The swallow happened again. Her hands, which had been resting on her thighs, moved to her knees and gripped.

  "I'm going to start the scan," she said. "Tell me if anything is uncomfortable."

  She began.

  Her hands started at my shoulders. Palms flat, fingers spread, the contact firm and warm. The Resonance activated: the low, broad frequency she used for biological assessment, tuned for tissue, bone, and channel mapping. The probe entered my channels through the meridians in my shoulders and began its systematic crawl through my body's infrastructure.

  The first scan had been professional. Thorough but boundaried: she'd mapped the major pathways and stopped at the edges of what the standard medical curriculum covered. This scan went deeper. Her hands moved from my shoulders to my upper arms, her palms tracing the deltoid meridians, then down to my forearms, turning my arms to access the ventral pathways. Each position change was announced — "moving to the left bicep," "turning your forearm, palm up" — with the clinical courtesy that I was beginning to understand was not just professional protocol but Petra's personal commitment to making sure I knew what was happening to my body before it happened.

  Nobody had ever extended that courtesy before. The announcement of each movement, each touch, each shift of her hands on my skin, accumulated into something larger than its components. It accumulated into trust. Not the trust of secrets shared or promises made. The trust of a body being handled with declared intent.

  She moved to my chest. Her palms flat on my pectorals, the Resonance probing the channels beneath the scars. I felt her probe encounter each scar's subdermal layer and pause. The scars weren't just surface damage. They were channel disruptions. Each prototype installation had cut through meridians, and each removal had left the channels scarred and rerouted. The synthetic Core had rebuilt the pathways around the scar tissue, creating detours and bridges that the biological architecture would never have produced.

  "Your channels have been cut and regrown," Petra said. Her voice was controlled. Her hands were not entirely steady. "Multiple times. The scar tissue has been incorporated into the channel walls. The Core has rebuilt pathways around every disruption." She moved her right hand to the longest scar, the one from collarbone to sternum. Her Resonance followed the scar's path and read the channel history beneath it: the original meridian, severed at age six. The regrowth, incomplete, scarred. The synthetic Core's rebuild, clean and efficient, routing around the damage.

  "The first one," I said.

  "The first procedure."

  "Yes."

  Her hand stayed on the scar. The Resonance read the history of the tissue: twelve years of damage and repair, installation and rejection, cutting and healing. The data was written in my channels the way rings are written in wood: each layer a year, each disruption an event. Petra was reading the record of my life through her palms.

  She moved to my back. I turned on the bed. Her hands settled between my shoulder blades and the Resonance mapped the dorsal channels and found more scars, more reroutes, more evidence of a body that had been opened and closed and opened again by people who were interested in the data. Her fingers traced the channel paths with a touch that was simultaneously clinical and something else — something that pressed slightly harder at the scar points, as if the extra pressure could communicate what words weren't saying.

  The scan continued. Down my spine, the vertebral meridians. Across my lower back, the lumbar pathways. Her hands were warm and her Resonance was gentle and the sustained contact was doing something to my nervous system that the synthetic Core couldn't fully process because the input wasn't Flux. It was touch. Prolonged, intentional, careful touch from a person who was reading my body's history and not looking away from what she found.