Leon told Serath over breakfast.
Not the ideal setting. The mess hall was filling with Bronze ranks and the grey protein was worse than usual, and Leon's right arm had been warm all night — the fingers twitching in the sling at irregular intervals. But he'd promised Ren he'd tell her, and the telling wasn't going to get easier by waiting for a better room.
He kept his voice low and described the solo relay session, the softening of the outer fusion layers, the autonomous restructuring, the spasms in the training yard. Clinical. Factual. The way Serath processed information best.
She listened without interrupting. Her spoon stopped moving around the second sentence and didn't start again. By the time he finished, her expression had passed through surprise and into something harder to name — the look of a person revising a map they'd been navigating by, discovering that several landmarks had moved overnight.
"Show me," she said.
Leon pulled his right arm from the sling under the table. Extended it toward her. Made a fist.
The fingers curled further than yesterday — not a full fist, the last two fingers lagging and stiff at the second knuckle, but the motion was real. Controlled. Voluntary. His forearm muscles engaged visibly beneath the skin.
Serath placed two fingers on his wrist. Her diagnostic touch moved through the dead channels with the delicacy of someone handling a specimen they expected to shatter. Leon felt her Origin Force probe the fused tissue, reading the strata, finding the softened outer layers that the relay had loosened.
Her fingers went still.
"The inner layers are viable," she said. Barely above a whisper. "The original channel architecture — it's compressed, scarred, but it's there beneath the fusion." She withdrew her hand and set it flat on the table. It trembled once, briefly, then went steady. "How long has the restructuring been active?"
"Two days. Since the first solo relay session."
"Two days." She closed her eyes. Opened them. The silver was very bright. "You should have told me immediately."
"I needed more data before—"
"You needed to control the narrative before I could object. That's not the same thing." Her voice was even — too even, the particular flatness she used when she was angry enough that precision became a weapon. "I've been designing a protocol around the assumption that your right arm is permanently nonfunctional. I've calibrated every session, every threshold, every timeline around that constraint. And the constraint changed two days ago and you didn't tell me."
"I'm telling you now."
"Now is two days late."
The mess hall murmured around them. Someone at the Bronze table laughed. The mundane noise felt absurd — the ambient soundtrack of institutional life playing over a conversation about fused meridians and autonomous energy reconstruction.
"You're right," Leon said. "I should have told you yesterday. I didn't because I was afraid you'd try to stop it."
"I might have."
"That's why."
"That's not good enough." Serath picked up her spoon. Put it down. A gesture that had nothing to do with eating. "The reconstruction is autonomous. You can't stop it. I can't stop it. What I can do is monitor it, account for it in the protocol, and adjust the training timeline so that when your right arm reactivates—"
"If."
"When. The viable tissue beneath the fusion is already conducting micro-currents. I felt them during the diagnostic. Your seed is feeding the reconstruction at a rate consistent with natural meridian healing, accelerated by residual relay resonance. At this rate, the outer fusion will fully soften in seven to ten days. The compressed channels beneath will begin expanding. You'll have partial right-arm function within two weeks."
Leon sat with that. Two weeks. The same timeline as the convergence approach. The same window.
"That means the right arm might come online at the convergence point."
"Yes."
"Is that good or bad?"
"Both. Two functional arms at the threshold gives you more capacity to hold the source's output. But if the right arm reactivates during the approach — mid-session, under load — the sudden addition of new channels to your cycling architecture could destabilize your entire system. Like plugging a new pipe into a pressurized line without shutting off the flow first."
"Kira said something similar. About the combat systems conflicting."
"Kira's right. The same principle applies to cycling." Serath stood and collected her tray. The anger hadn't dissolved — it sat beneath her composure like sediment in a glass, visible if you knew where to look. "We adjust the protocol tonight. I need to redesign the resistance exercises to account for dual-arm recovery." She paused. "And Leon."
"Yeah?"
"Don't withhold information from me again. I am not Voss. I don't manage carriers. I train partners. But I can't partner with someone who decides what I'm allowed to know."
She left.
Leon sat with his warm arm and his cold breakfast and the knowledge that he'd earned exactly the response he'd gotten.
Marek's first integration session was that night.
Serath had designed it for the smaller resonance room adjacent to the main chamber — close enough to the source's frequency for the seeds to respond, far enough that the pull wouldn't overwhelm an unintegrated carrier. Leon, Serath, and Marek. Asha was back but exhausted from the Greyward expedition, and Jorin's suppression was still too fragile for active chamber work.
Marek arrived in training clothes, his right shoulder still taped from the sparring match. He moved with the controlled efficiency that had defined him since day one, but the underpinning was different now — less performance, more awareness, the posture of someone who'd learned that the body they lived in was a shared space.
"Rules," Serath said. She stood at the room's center with protocol sheets in hand and silver hair tied back. "First integration is passive. You don't cycle. You don't push. You sit, you breathe, and you let your seed encounter the source's ambient frequency. Your job is to feel, not to do."
"And if the seed does something on its own?"
"It will. That's normal. Seeds respond to the source's proximity with varying degrees of activity. When it moves, let it. Don't clamp down — suppression during first integration can cause backlash."
Marek nodded and sat. Cross-legged, back straight, hands on his knees. The posture of someone who'd been meditating since childhood: trained, precise, habitual.
Leon sat across from him. Three feet of space between them. Close enough for the seeds to register each other. The resonance room's walls carried the source's frequency in muted tones — a diluted version of the main chamber's pulse, enough to activate without overwhelming.
"Begin," Serath said.
Marek closed his eyes. Leon watched.
For the first few minutes, nothing visible happened. Marek breathed. The room hummed. Leon's seed observed Marek's from across the distance — the same wary, competitive circling from the corridor, but less charged. More clinical. Two energies taking each other's measure.
Then Marek's seed moved.
Leon felt it before he saw any physical sign — a shift in the room's resonance, a new frequency entering the shared space. Marek's seed reaching outward for the first time, tentatively, toward the source's diluted pulse.
Marek's jaw tightened. His hands pressed harder against his knees — the physical tells of someone feeling energy move inside them in a direction they hadn't chosen and couldn't reverse.
"Let it," Serath said. "Don't fight. Just observe."
Marek's seed reached further. The resonance room's walls brightened, the mercury-veins responding to a new carrier's activation, the source acknowledging another fragment with a warm pulse that traveled through the floor.
Leon's seed responded. Not to the source. To Marek.
The competitive circling collapsed into something more active — Leon's seed extending toward Marek's, drawn by the shared frequency, wanting to synchronize the way it had synchronized with Jorin. Except Marek's seed wasn't Jorin's. Jorin's had been frightened, passive, grateful for stability. Marek's was aggressive. Dense. Structured the way its host was structured — layered, strategic, probing for advantage even in the act of reaching outward. It met Leon's seed at the midpoint between them and didn't harmonize. It tested. Pushed against Leon's frequency. Tried to read it the way Marek read opponents: mapping, measuring, finding the shape of what it was touching.
Leon's right arm flared.
Not a spasm, not a twitch — a full-body pulse of heat that raced from his shoulder to his fingertips and lit up the softened fusion layers like a wire carrying sudden current. The seed, distracted by its engagement with Marek's, had diverted resources to the right arm involuntarily: the same split-focus problem from the session with Serath, except triggered by carrier proximity instead of the relay.
His right hand opened. Closed. Opened again. The fingers moved with a fluidity they hadn't had twenty-four hours ago, the softened pathways conducting the seed's overflow energy in bursts that felt like electric shocks and looked like—
"Leon." Serath's voice. Sharp. "Your right arm."
He looked down. The sling had loosened and his right hand was visible — and the skin from wrist to elbow was glowing. Faint, internal, the nameless color bleeding through flesh as the seed poured energy into channels that were halfway between fused and functional.
Marek's eyes opened. He saw the glow, and his seed surged — reaching for Leon's right arm with the specific hunger of something that recognized the unnamed frequency pouring from it.
The two seeds locked.
Not harmonized. Not competitive. Connected. A bridge of unnamed energy between Leon's right arm and Marek's core, formed without consent, transmitting in both directions. Leon felt Marek's seed — dense, layered, strategic — and Marek felt Leon's — warm, tentative, split between two arms that didn't agree on how to function.
"Break contact," Serath said, moving. Her hands extended, cycling anchor energy. "Leon, pull back. Marek, close your—"
Too late.
The connection transmitted the right arm's reconstruction pattern to Marek's seed. Like a file being copied between systems, the blueprint, the softening protocol, the autonomous restructuring — all of it flowed through the bridge in a burst of data that Leon's seed hadn't meant to send and Marek's seed hadn't meant to receive.
Marek flinched. His right hand came up and pressed against his sternum — the same gesture from the corridor, the first time his seed had moved. Except now his seed was processing new information. Information about how to restructure fused pathways. Information it had no use for because Marek's pathways weren't fused.
But information it now had.
The connection broke. Leon yanked his seed back, Serath's anchor energy slicing through the bridge like a blade. The glow in Leon's right arm died. The room's resonance dropped to baseline. The source's pulse retreated to a murmur.
Silence.
Marek sat with his hand on his chest, breathing hard, eyes wide — not frightened, but processing. His seed churned inside him; Leon could feel it from three feet away, sorting through the data it had received, integrating the blueprint into its own architecture even though the blueprint wasn't for it.
"What did I just give him?" Leon asked. His voice was rough, his right arm throbbing with the glow's aftermath — a buzzing numbness running from elbow to fingertip.
"I don't know," Serath said. Her anchor cycling was still active, a precaution ready to intervene if either seed destabilized. Her face was pale. The protocol sheets on the floor beside her were irrelevant now. Whatever plan she'd had for Marek's first integration, this wasn't it. "The transmission was too fast. I couldn't read the content. Only the volume."
"It was a lot," Marek said quietly. His hand still on his sternum. "Leon. I can see your arm."
"What?"
"Inside my head. I can see the architecture of your right arm. The channels. The fusion. The softening. Like a diagram, except I can feel the dimensions." Marek looked up. His eyes held something Leon had never seen in them before — not fear, not curiosity, not the strategic assessment that was his default mode, but genuine bewilderment. The unguarded kind. "Why can I see your arm inside my head?"
Leon didn't have an answer.
Serath didn't have an answer.
The seed in Leon's chest was very quiet — the particular quiet of something that had just done something it didn't understand and was waiting to find out what it had built.
The room hummed. The source waited beneath them. And somewhere inside Marek Halden's core, a blueprint that belonged to Leon's body was taking root in someone else's seed.