Echo's transmission completed at 4 AM.
Grandmother Seo had been awake since midnight — she was always awake at midnight, the 923-day habit that made the concept of sleeping through it feel like something that happened to other people — and the fragments had been arriving through her resonance crystal for three hours, each one requiring the slow translation work that cross-dimensional communication demanded.
She knocked on Ryu's door at 4:17. He was already awake. The passive detection ability had calibrated overnight and the absence of sacrifice-energy signatures within five kilometers had become a felt thing rather than a checked thing, the specific alertness of someone who'd recently installed a new alarm system and was learning its silence.
He read the translation sitting on the corridor floor with Grandmother Seo beside him, her canvas bag between them, the building's night sounds around them.
The defector's name was Solin. Had been Solin — Echo couldn't confirm their current status. They'd crossed from Void's faction to Echo's approximately six years ago, carrying years of sacrifice-system work and specific knowledge about milestone events in the accumulation system.
What Solin had known about Day 700: the Domain Seed's manifestation event didn't just create a pocket dimension. It created a point of absolute stability in the dimensional fabric — a *nail*, as Grandmother Seo had translated earlier, but the new fragments gave more specificity. Not just a nail. A nail made of the login user's accumulated discipline, their entire streak's worth of daily investment, crystallized into a permanent structure in the dimensional architecture.
For twelve minutes after that crystallization began, the structure was in a phase-transition state. Semi-permeable. Accessible to dimensional energy in a way it wouldn't be once fully established.
If sacrifice-energy entered during those twelve minutes, Solin believed the Domain Seed would crystallize with a corruption at its core. Not immediately visible. Not immediately damaging. But over time — as the Domain Seed grew and became more central to the login user's power structure — the corruption would expand. The accumulation architecture built on a corrupted foundation would eventually produce not stability but its opposite.
"A seed grown in poisoned soil," Grandmother Seo said.
"And the Domain Seed grows every day," Ryu said. "Every login after Day 700 adds to the foundation."
"Yes. Whatever enters in those twelve minutes would compound into the foundation with every subsequent day." She looked at him. "Solin did not know how many sacrifice users would need to be present during the manifestation to corrupt it. They believed one might be sufficient. They also believed the vanguard's commanders knew more than Solin did."
He thought about it. The crystallization window. Twelve minutes at Day 700. The vanguard had crossed early to be in position for a specific moment that was still 127 days away.
"They're not in a hurry," he said.
"They have been patient for six years, from Void's perspective," Grandmother Seo said. "Solin defected six years ago. They've been planning this since then." A pause. "Echo said one more thing. The vanguard commander — the person coordinating the Korea force — is not Void himself. Void operates through isolated cells and rarely exposes his own person." She looked at him. "The commander is someone called Ashur. Echo's faction knows him. He was once Echo's second. He believed cooperation was impossible. He left her faction for Void's fifteen years ago." Her fingers moved — counting. "At that time, his sacrifice-day equivalent was approximately four hundred."
Four hundred days of sacrifice. Against Ryu's 573 of accumulation. Their systems built the same frequency through opposite mechanisms. Whatever Ashur had given away in fifteen years of Void's operation had built him into something that the outline of four hundred days didn't fully capture.
"Echo sent this knowing Void would eventually find out she sent it," Ryu said.
"Yes."
"Why."
Grandmother Seo looked at the translation. "She said: *I have watched Ashur take what I built. I am not without some interest in seeing it contested.*"
---
Kane's intelligence team had found the Korea force.
Not their exact position — the Korea force was mobile, which suggested they'd learned from the Japan contingent being pinpointed. But Kane's aerial and dimensional monitoring, updated since the Day 572 attack, had triangulated a corridor of movement: the force was operating in a zone spanning from the DMZ's eastern edge to the coast near Donghae. Mountainous terrain. Limited population. Multiple defensible positions with access to the dimensional barrier's thinner northern zones.
Forty-seven signatures confirmed. Possibly up to sixty.
"They're staging," Kane said over the morning call. He'd been awake as long as anyone. His eyes had the specific quality of someone running on coffee and the determination of a man who'd made a promise about assets and was keeping it. "Not waiting in a fixed position. Rotating. Never in one spot more than eighteen hours."
"Making it impossible to preposition a strike force," Nyx said.
"Yes. But the corridor they're operating in has a twelve-kilometer span." He shared the topographic analysis. "They can't cover twelve kilometers of mountain terrain with forty-seven sacrifice users unless they're moving in predictable patterns. I have mapping drones running the corridor now." He paused. "I should have position windows every four hours. They won't be where the drone found them — but they'll be within three kilometers of it."
"Ryu's detection range is five kilometers," Nyx said.
"Today," Ryu said. "Growing by one kilometer every fifty days."
"You don't have fifty days to grow range. You have twelve hours between drone windows." She looked at the topographic map. "Three kilometers of forest in mountainous terrain. Kane gives us the four-hour window, we're still chasing a moving target."
"The echo-map," Hiro said. He was at his workstation, the frequency-masking rebuild running on the display behind him. "If I cross-reference the drone footage timing with Ryu's echo-map, we can track the movement vector. Not just where they were — the direction they were moving and the rate. We can predict the next four-hour window position with a margin of maybe half a kilometer."
"That's close enough for an engagement," Aran said. He was very much awake this morning.
"It's close enough for an approach," Ryu said. "The engagement is the harder problem."
---
The harder problem was that forty-seven sacrifice users with four-hundred-day-equivalent training on their commander's side were not a problem that the current network could engage conventionally.
Base stats. Elena's reduced capacity. Two anchor positions held by Park and Yoshi who were capable but not trained for offensive combat operations. Jin at Day 84, growing but not ready for a forty-seven-person sacrifice-user engagement.
The Midnight Surge: sixty seconds at triple stats. Followed by forty-two minutes of total vulnerability. Available once per day, only at midnight.
Nyx looked at the numbers across the morning. She did what she always did with tactical problems: built the structure of it, found the load-bearing points, identified what could fail and what had to hold.
"We can't take forty-seven in a direct fight," she said. "We need to separate them."
"The rotating-position strategy is designed to prevent separation," Kane said.
"It's designed to prevent being followed to a fixed position. It's not designed for being engaged while moving." She looked at the topographic map. "If they're moving in a corridor, they have a front and a rear. Whatever their formation is, they have a vanguard element that's furthest from the main body during movement." She looked at Ryu. "Cut the vanguard element off from the rest. Engage the separated group with numbers and capability advantage."
"We'd need to be in position before they arrive at a predicted location." Ryu looked at the map. "The four-hour window from Kane's drones. If we're in the right position—"
"With Hiro's movement vector analysis to predict their next position." She looked at him. "And we need to go before the Japan force has any indication that their Korea counterparts are being engaged. The Japan eighteen will move if they know we're in Korea."
"Which means we go dark. No comms activity that can be intercepted. No Kane assets visible in the approach." He paused. "And we go soon. Before the vanguard adapts to being predicted."
"Tonight," Nyx said. "If the drone window gives us a viable position by 1800."
"Tonight," he said.
---
Hiro delivered the frequency-masking first iteration at 3 PM.
It was temporary — a broadcast overlay that shifted the transmission nodes' output frequency on an eleven-second irregular cycle, making sustained sacrifice-energy conversion impossible. Not perfect: if a sacrifice user spent enough time in proximity, they might adapt to the shifting frequency. But it would prevent the rapid harvest that had happened at 5:35 AM.
He installed it personally. All twelve of the external nodes that remained after the attack — the ones in the interior that hadn't been reached. He moved through the building's exterior with the focused precision of someone doing the one thing available to them that was both technically necessary and personally necessary, and nobody commented on the fact that he was also, by moving through the building's damaged exterior, walking through the physical consequences of what he'd done.
He finished at 4:47 PM. Came to find Ryu in the tactical room.
"Done," he said. "The interior nodes will hold the masked frequency indefinitely. The rebuild of the exterior nodes starts tomorrow." He paused. "And I've started the movement-vector analysis of the Korea force's corridor. Based on the drone footage from this morning and the echo-map calibration you ran last night—" He held out the tablet. "If they maintained their rotation pattern, they'll be in this position window at approximately 2100 tonight. Window closes around 2300."
Ryu looked at the position. The mountain terrain northeast of Donghae. A valley approach, partially forested, with two likely transit corridors through the terrain.
"Margin," he said.
"Half kilometer. Maybe six hundred meters in the rough terrain."
"That's workable."
Hiro looked at him. "You're going tonight."
"Yes."
He looked at the tablet. Back at Ryu. "The movement-vector analysis will be more accurate with real-time echo-map input. If someone with the echo-map ability were on-site rather than remote—"
"You'd be at the engagement with me," Ryu said.
"I know that." Hiro's voice was level. "I'm not asking to go. I'm telling you the accuracy improves by a significant margin with on-site input." A pause. "It's your call."
Ryu looked at him. At the man who'd built every technical system they relied on and had been compromising those systems for eight months and had confessed when he could still have run. Who was now rebuilding, node by node, the architecture he'd let be used against them.
"If you go," Ryu said, "you're in a combat engagement with forty-seven sacrifice users. You're not an anchor. You're not a fighter."
"I can run the analysis from a rear position. Safe by half a kilometer."
"Nothing is safe by half a kilometer in a sacrifice-user engagement."
"I know." Hiro held his gaze. "I know."
Ryu looked at him for a long moment.
"Be ready at 1900," he said.
---
The thing that changed the evening's plan arrived at 6:45 PM.
A knock at Silver Blade's main entrance. Not the combat approach — the front door. One person. Kira's exterior team saw them on the perimeter sensors and reported: a single individual, standing at the entrance, not approaching further. Dimensional energy signature present. Sacrifice-based.
Alone. No support. Carrying nothing visible.
Ryu was at the tactical room when the report came in. He looked at Nyx.
"That's not an attack," she said.
"No." He looked at the perimeter sensor feed. The single figure. Calm posture. Not the posture of someone preparing to fight. "That's a message."
He went to the entrance himself. Took Nyx and two of Kira's guards. Left everyone else inside.
The person at the door was a young man — mid-twenties, slight, with the particular quality of someone who'd traded away several layers of the self that made a person look young. His eyes had the specific depth of significant sacrifice. He held both hands visible and open. His dimensional energy was present but passive.
"I am a courier," he said. His voice carried the translation-frequency pattern that Ryu had learned to hear from working with Echo's faction. "From Commander Ashur. He asks that you accept a communication."
Ryu looked at him. At the hands. At the eyes. At the posture.
"Accepted," he said.
The courier reached into his jacket and removed a small resonance crystal — different from the communication crystals Grandmother Seo used, darker, structured differently, the architecture of the sacrifice system's communication method. He held it out.
"He says: I know you are planning to engage the Korea force tonight. I am offering a conversation before you do."
Nyx, behind Ryu, went very still.
"They know we're planning an engagement tonight," she said, flat and quiet.
Ryu looked at the crystal. At the courier.
The courier said: "Commander Ashur says further: *I came early not to win quickly. I came early because we are running out of time. I would prefer you understand that before tonight.*"
Ryu took the crystal.
It was warm. The specific warmth of accumulated energy — not cold, not the absence of something. Something present.
He looked at the courier. "Tell him he has until midnight."
The courier nodded and walked away from the building without turning around, the specific composure of a person who'd delivered what they came to deliver and didn't expect to be shot in the back.
Ryu looked at the crystal.
Day 573. The plan had been to strike the Korea force tonight.
The plan needed to hold for a few hours longer.
He went inside to find Grandmother Seo.
