Voss hadn't moved from the data terminal in six hours.
The Severance schematics filled the operations space display in layers that overlapped and intersected and contradicted each other where the ten-thousand-year corruption had eaten through the data. Progenitor engineering notation that Voss had spent weeks learning to read, rendered in the biological shorthand of a civilization that thought in dimensional frequencies instead of mathematics. It was like reading a blueprint written in music.
Sable sat against the wall with one hand on the bio-tissue and her eyes half-closed. The communication layer was open at low depth, the Progenitor notation flowing through it, and Sable was translating the symbols that Voss's human education couldn't parse. Not speaking. Feeding the translations directly through the ship's systems to the display, the communication architecture converting dimensional concepts into visual representations that approximated human understanding.
"This section is the core mechanism," Voss said, pointing to a cluster of interlocking geometries that pulsed on the display. "The dimensional severance itself. The principle is—" She stopped. Touched the display. Rotated the schematic. "Aria-7. Am I reading this correctly?"
"You are." The AI's processing indicators were at ninety-two percent. The remaining eight percent was running the ship's navigation, which said something about the complexity of the data they were processing. "The Severance mechanism generates a localized discontinuity in the void substrate. Not a tear. Not a collapse. A clean cut. The dimensional equivalent of severing a nerve. The target entity's connection to the substrate is interrupted permanently. Without substrate access, the entity cannot maintain coherent existence."
"It dies," Voss said.
"It ceases to exist as a unified consciousness. The energy that comprises the entity disperses into the substrate as ambient dimensional noise. Functionally: yes. It dies."
Voss leaned back from the display. Her hands were trembling and she folded them in her lap where the trembling was between her and the chair. "The power requirements."
"Massive. The original design called for the full output of five Progenitor warships channeled through a purpose-built focusing array. The array was the weapon. The ships were the battery." Aria-7 paused. "The array was what the construction fleet was building when it was destroyed. The components are the wreckage we flew through."
"Can we build a new array?"
"No. The construction fleet carried materials that we cannot fabricate. Specialized dimensional-frequency crystals grown over decades in controlled void environments. The Progenitor industrial base that produced them no longer exists."
Voss was quiet. The display glowed. The schematics rotated slowly, the corrupted sections showing as gaps in the geometry, holes in the design where data had degraded beyond recovery. A weapon that could kill a god, drawn on paper that was falling apart.
"But," Aria-7 said.
Voss looked up.
"The focusing array is an amplifier. Its function is to concentrate and direct the severance energy. The energy itself is generated by the ships' dimensional drives. If an alternative focusing mechanism could be found—one capable of the same amplification at the same frequency—"
"The Ascension Platform," Voss said.
"The Ascension Platform was designed to channel dimensional energy at the frequencies required to interface with the Void Throne. Those frequencies overlap significantly with the Severance weapon's operational parameters. The Platform's energy systems are—" Aria-7 paused again. The AI was doing something Voss had learned to recognize: choosing between mathematical precision and narrative clarity. "The Platform was built to be a battery. With modification, it could be made into a weapon."
"What modification?"
"That is where the corruption in the schematics creates the problem. The calibration data for the focusing array is sixty-three percent degraded. I can extrapolate some of the missing parameters from the intact portions. But the margin for error in a dimensional severance operation is—"
"Zero," Voss said. "The margin is zero."
"The margin is zero."
---
The second convergence zone hit them at hour seven.
Kira saw it through the passive interface before the sensors flagged it: two dimensional currents colliding at an angle that created a wall of turbulence across their path. Worse than the first one. The currents were faster here, deeper in the Expanse, the collapsed spacetime more compressed and more chaotic. The turbulence zone was wider and the thread of stable spacetime running through it was thinner.
"Convergence zone ahead," Cross said from the tactical console. Redundant. Kira already knew. But Cross said it anyway because the admiral had spent thirty years in fleet operations and fleet operations meant verbal confirmation of what everyone could already see.
"I see it." Kira pressed her left palm flat. "Going to combat interface."
"Your capacity—"
"I know my capacity."
She engaged. Left palm down. Full connection. The world expanded.
The convergence zone in four dimensions. The turbulence rendered in the Progenitor perception that the combat interface provided, the chaotic spacetime visible as a churning mass of colliding currents. The thread of stability was there. Thinner than the first one. It wound through the turbulence like a crack in ice, barely wide enough for the warship, curving in three spatial dimensions and at least one that didn't have a name in human language.
She steered. The ship responded. The bio-tissue drive adjusting to her course corrections with the precision of a system designed for this exact kind of navigation, the warship threading through collapsed spacetime the way Kira had once threaded through asteroid fields in her Navy days, except that asteroid fields didn't fold back on themselves and the rocks didn't exist in dimensions she couldn't see without alien technology wired into her nervous system.
Fourteen seconds. The turbulence on both sides pressing close enough that the hull's bio-tissue reacted, the amber flickering to the deep bronze of the Expanse environment, the ship's biology flinching from the raw dimensional chaos on either side.
Sixteen seconds. The thread curved. Kira followed it. The warship banked in a direction that wasn't left or right or up or down but was the directional equivalent of turning ninety degrees in a dimension that the crew's three-dimensional bodies couldn't perceive.
Eighteen seconds. Through.
She disengaged. The combat interface shut down. The world contracted.
Eighteen seconds. Longer than the first. Six seconds longer, because the convergence was worse and the stable thread was more complex.
She did the math. Twelve seconds on the first. Eighteen on the second. Four more convergence zones minimum before the inner Expanse, and Cross had said the inner regions were unmapped. Could be more. The convergences were getting worse as they went deeper.
Four minutes of combat capacity. Thirty seconds spent on navigation. Three minutes thirty seconds remaining. And no guarantee that the remaining convergence zones would be as simple as the first two.
"Status?" Cross asked.
"Clear." Kira's left hand rested on the armrest. The neural pathways ached. Not pain. The ache of muscles after a sprint, the tissue telling her it could still work but wanted her to know it was keeping score. "Next convergence?"
"Imperial charts show the next identified zone approximately two hours ahead. But the charts are for the outer Expanse. We're entering the transition region. The data becomes unreliable."
"Aria-7. Can the ship's sensors predict convergence zones before we reach them?"
"The bio-tissue sensors can detect dimensional current patterns approximately forty minutes in advance of our position. Sufficient warning to prepare but not to reroute. The Expanse's currents are too dynamic for long-range prediction."
Forty minutes of warning. Enough time to brace. Not enough time to find another way.
Kira flexed her left hand. The fingers responded. The connection was still there. The capacity was still there. Shrinking, but present.
She didn't think about what happened when it reached zero.
---
Corvin found Voss in the operations space at hour nine.
He came up from the sub-chamber walking like his legs had forgotten they were supposed to bend. Nine hours on the floor with his hands in the bio-tissue. His knees popped on the third step. The five pillars were stable. The power output was steady. The Expanse's dimensional currents pulled at the drive and Corvin had learned their rhythm and was compensating without conscious effort, the background connection to the power architecture running like breathing.
He stopped in the doorway of the operations space and looked at what Voss had done with it.
The display covered three walls. Schematics, notes, Progenitor notation, human annotations, Aria-7's analysis overlays. The data from Kaelen's vessel spread across every available surface, organized in a system that probably made sense to Voss and to no one else in the universe.
Sable was asleep against the wall. One hand still on the bio-tissue, the communication layer at its lowest level, the connection maintained even in sleep. Voss had put a blanket over her. The blanket was from the *Requiem*'s stores, human-made, and it looked absurd draped over a woman who was plugged into an alien ship's communication network.
"The schematics," Corvin said.
Voss didn't turn from the display. "The weapon is real. The principle is sound. The Progenitors designed it to work and the engineering supports the design."
"But."
"But the focusing array is the critical component and the focusing array was destroyed ten thousand years ago and the materials to rebuild it don't exist anymore." She touched a section of the display. The corrupted data, the gaps in the geometry. "However. The Ascension Platform's energy systems operate at compatible frequencies. If we can modify the Platform to function as a substitute focusing array, the Severance could theoretically be deployed through it."
"Modify the Emperor's machine."
"Modify the Emperor's machine that he spent four hundred years building to do something entirely different than what it was designed for, yes." Voss turned from the display. Her eyes were red-rimmed. The forty-year academic in her wanted to spend months on this data. The doctor in her knew they had hours. "Corvin. I need your assessment of something."
He waited.
"The Severance requires five synchronized dimensional energy inputs. Five pilots, five drives, five frequencies in harmonic alignment. The original design used five Progenitor warships. We have one." She pointed to a section of the schematic. "The Platform could provide four of the five inputs. Its energy systems are subdivided into four primary channels. But the fifth input has to come from a ship with a living bio-tissue drive operating at Progenitor frequencies."
"Our ship."
"Your pillars." She looked at him. "The five-pillar configuration that you achieved. The resonance frequency it produces. I need to know if that frequency can be sustained at maximum output for an extended duration while simultaneously harmonizing with four external energy inputs of potentially variable quality."
Corvin looked at the schematic. The dimensional engineering that he couldn't read but could feel, because the ship's power architecture spoke the same language and his connection to it translated what his education couldn't. He pressed his hand against the wall. The bio-tissue responded, the ship's systems feeding him data through the background connection, the power management architecture showing him what Voss was asking in terms he understood.
"The pillars can sustain maximum output for—" He closed his eyes. Felt the ship. Felt the pillars. Felt the tolerances in the architecture, the margins between operational capacity and structural failure. "Seven minutes. At maximum output with external harmonization. Seven minutes before the drive begins to degrade."
"The Severance operation, based on the intact portions of the schematics, takes between three and five minutes."
"Then the margin is two to four minutes."
"If nothing goes wrong."
Corvin opened his eyes. "Does anything ever go wrong?"
Voss didn't laugh. But the corner of her mouth moved. The ghost of humor in a room full of weapons schematics and sleeping women and the mathematics of killing a god.
"I need to talk to the Emperor," Voss said. "About his Platform. About what it would take to modify it. I need the engineering specifications of the machine he built."
"Kira won't like that."
"Kira will understand that the alternative to talking to the Emperor is sitting in the Void Throne forever. Three of us taking turns dying in a chair, or four of us if we count you, while the seal holds and the galaxy goes on without knowing what's underneath it." Voss pulled up another section of the schematic. The calibration data. The corrupted sections. The gaps. "The Severance can end this. Not hold it. Not contain it. End it. But only if we can fill in the missing data, and the Emperor has four hundred years of dimensional engineering research that might bridge the gaps."
Corvin stood in the doorway. The sub-chamber below him, the five pillars holding steady, the ship carrying them deeper into the Expanse. The Throne at its center. The seal around a thing that was pressing, pressing, pressing.
"Tell the captain," he said.
---
Sable woke at hour ten with the Expanse's voice in her head.
Not the chaos of the outer regions. Not the dimensional noise that her filters had reduced to background static. This was different. Deeper. Closer. The communication layer was carrying a signal that wasn't noise and wasn't the ship's systems and wasn't the dead vessel's ten-thousand-year recording.
Something was talking to her from inside the seal.
She sat up. The blanket fell. Her hand stayed on the wall. The bio-tissue was warm, pulsing at an elevated rate, the ship's systems reacting to whatever Sable was receiving through the communication layer.
"Doctor Voss."
Voss turned. Saw Sable's face. Put down the data tablet.
"What is it?"
"The Hollow King." Sable's hand pressed harder into the bio-tissue. The communication layer's filters were working at maximum, sorting the signal, reducing it to something a human neural architecture could process without breaking. "It knows we're coming. It can feel the ship. And it's—"
She stopped. Listened. Her face changed.
"It's not trying to stop us," she said. "It's trying to talk to us."
Voss looked at the display. The Severance schematics. The seal. The entity behind it that had been pressing against its containment for ten thousand years.
"What is it saying?"
Sable closed her eyes. The communication layer at full depth. The filters straining. The signal from inside the seal, from the thing that the Progenitors had locked away and the dead pilot had spent ten thousand years trying to tell someone how to kill.
"It's saying: *Let me show you what I am.*"
The ship's bio-tissue went cold. Every surface, every corridor, every chamber. The amber draining to gray in a single pulse, the ancient vessel's biological response to a signal from the entity that had killed its fleet, its pilot, its civilization.
Then the amber returned. Slowly. Fighting back. The ship warming itself against the cold of what it remembered, the bio-tissue recovering its color the way a person recovers their nerve.
Sable opened her eyes. "Captain," she said into the comm. "We need to talk. All of us. Now."
