The team came through the inner chamber's threshold in the formation they used when the operational situation was unknown: Rosanne first, reading, the others spaced for coverage.
They read Vorash.
He watched them do it — each of their sensory architectures working the same source material from different angles. Rosanne's light-element precision mapping the aura's structure. Mika's elemental sensitivity reading the law signature. Jessica's electromagnetic read picking up the specific field distortion that a practitioner at this tier produced. Donna's atmospheric awareness registering the ambient pressure shift.
The Ghost Sense programme's fundamental design had been built around exactly this: four practitioners whose combined read was more complete than any individual assessment.
Rosanne's expression when she completed the read was the one she used when something was significantly more complex than the operational picture had indicated.
He explained what he had learned.
The team listened with the specific quality of practitioners who had been doing difficult work for long enough that encountering a situation that required completely revising the established model was not alarming — it was data that required integration.
Vorash watched this process with the attention of something that had been alone for a very long time and was observing how groups of practitioners thought through problems together.
When Markus finished, Rosanne said: "The corruption infected the construction twenty-five years ago. The same period the source node was planted in the aquifer system."
"The source node was Vorash's," Markus said. "The modification to the source node's architecture came after."
"Which means," Donna said, working through the sequence, "the original source node was not designed to produce the wrath frequency. Someone introduced that after Vorash established it."
"And introduced the same architectural corruption into the bridge construction at the same time," Mika said. "Same period, same modification type."
"The same third party," Jessica said.
Markus looked at Vorash.
"You said you became aware of the modification approximately ten years ago," he said. "What changed? How did you identify it?"
"The entity production in the manufacturing sector," Vorash said. "The entities began expressing the wrath frequency approximately twenty-five years ago. For the first fifteen years I believed this was an unintended consequence of the construction material's interaction with the manufacturing process. When I traced the frequency to its source and found it integrated into the bridge's construction material rather than the manufacturing sector's independent architecture — that was when I understood the modification had been deliberate."
"And the entity that made the modification," Markus said. "Do you have any read on it?"
"No," Vorash said. "The modification was made with sufficient expertise that it integrated without leaving distinguishable practitioner-signature residue. Someone who understood the construction language well enough to work in it without announcing themselves."
Markus thought about the architectural language the construction used — the same language as the temporal anchors, the same language as the megalithic arch. The pre-framework construction tradition that predated the mana event.
"Someone else from before the framework's installation," he said.
Vorash was still.
"It is the most consistent interpretation," Vorash said. "An entity with native understanding of the pre-framework construction language. Which does not describe any practitioner developed within the current framework."
"How many entities from before the installation are currently present in the primordial world," Markus said.
"That I know of," Vorash said. "Two. Myself, and one other whose location I have not been able to fix with certainty for approximately forty years."
"Who," Markus said.
The name Vorash gave was not one he recognised.
He sent it to Elena's restricted archive team and to Valerian's office immediately.
Rosanne had been examining the construction's middle chambers during the conversation, the team's mapping data continuing to accumulate through the spatial sense's shared read.
She came back to the inner chamber and produced her notebook — the same one from the academy, thicker now, the pages well-used — and laid out the questions in the order she had determined mattered.
"The corruption in the construction material," she said to Vorash. "You said you couldn't address it without access to the original construction records."
"The corruption has integrated with the bridge's structural components at a depth that requires understanding the component's original specification to identify the contamination against the baseline," Vorash said. "Without the baseline, addressing the corruption risks addressing construction material rather than the corruption."
"The records are in the archive," Rosanne said.
"Yes," Vorash said.
"Can the extraction methodology work at construction scale," she said to Markus. Not to Vorash — to Markus, because it was a question about the spatial law's capability, not Vorash's.
He had been working through this since Vorash first mentioned the infection.
"The Saylor extraction and the Aethelgard practitioner extractions were addressing corruption integrated into biological channel systems," he said. "The construction material is different — spatial law architecture rather than biological channels. The principle is the same: the corruption occupies coordinates within the structure, the spatial law addresses those coordinate relationships. The scale is significantly larger."
"Can you do it alone," she said.
"No," he said. "Not at this scale. The corruption is distributed through the entire construction material — thirty years of integration. To address it correctly requires reading the entire construction simultaneously, which is beyond the single-practitioner application range."
"Isolde," she said.
"Isolde, and the Sovereign Catalyst methodology," he said. "The construction material equivalent of what she developed for the practitioner extractions. But building the specific compound for construction-scale application requires the original records Vorash has — the baseline specification so the compound targets the corruption rather than the construction."
Rosanne looked at the archive wall where Vorash had indicated.
"How long," she said.
"Isolde would need to read the records," Markus said. "Build the formulation against them. Test the application methodology. At the speed she works — weeks, not months, if she has uninterrupted access."
"The construction's completion timeline," Mika said to Vorash. "At your current calibration pace, how long before the bridge is functional?"
Vorash calculated.
"Without the corruption complicating the final calibration work, the alignment would complete in approximately four weeks," he said. "With the corruption's interference degrading the calibration precision — I have not been able to maintain the alignment without the corruption degrading what the calibration establishes. Each advance I make is partially undone."
"So the corruption is not just an ethical problem," Donna said. "It's preventing the construction from completing."
"Yes," Vorash said. "It is structured to prevent completion. Whatever entity introduced it wanted the bridge to exist in a state of perpetual degraded function — producing the wrath entities, corrupting the surrounding environment, but never completing to a state where I could use it."
Rosanne looked at this from the commander's perspective.
"The third party wants the damage without the bridge," she said.
"Without Vorash reaching the framework boundary," Markus said. "If he reaches the boundary, he's no longer in the primordial world. No longer controllable. The corruption keeps him here, keeps him generating the wrath-driven entity output, keeps the framework boundary degrading — and keeps him unable to stop it or leave."
The team sat with this.
"He's been a weapon being pointed at the framework for twenty-five years," Jessica said. "Without his knowledge or consent."
"Yes," Markus said.
He looked at Vorash.
"Do you want the bridge completed," he said. "Cleanly, without the corruption. If we can develop the extraction methodology and apply it — your bridge, aimed at the framework boundary, functional and clean."
Vorash looked at him.
"I want to go home," he said. "That has been the only objective for three hundred years."
"The framework boundary is at the temporal anchor's coordinate in the northern frontier of the Borealis Dominion," Markus said. "On the framework side of that boundary is the Valerian Empire. If the bridge opens to that coordinate, the Valerian Emperor needs to be part of this decision."
"I am aware that my construction's arrival point is in your world," Vorash said. "I would not cross into a sovereign territory without agreement from that territory's governance."
Markus read him through the Fate's Eye on this statement.
True.
"Then we proceed in stages," Markus said. "First: Isolde accesses your archive, reads the construction records, and develops the extraction compound for construction-scale application. Second: we apply the extraction. Third: I communicate with Valerian about the bridge's completion and arrival point, and we proceed with that agreement in place or we discuss alternatives."
"And the third party," Rosanne said. "Whatever entity introduced the corruption in the first place. We address that construction and move on, but they're still at large."
"Yes," Markus said.
"The name Vorash gave you," she said.
"In the archive team's hands now," he said. "And Valerian's intelligence division." He looked at the team. "The entity with pre-framework knowledge sophisticated enough to infiltrate this construction undetected is not a problem we solve today. Today we solve what's in front of us."
He looked at Vorash.
"I need to bring my grandmother here," he said. "She is a Tier 7 alchemist with experience in corruption extraction at the compound level. She will need access to your archive and several weeks of uninterrupted work."
"Your grandmother," Vorash said.
"Isolde Aurelian," Markus said. "The Aurelian family's alchemical lineage."
Something shifted in Vorash's expression — the specific shift of very old recognition.
"Aurelian," Vorash said. "The lineage that built the eastern leyline network."
"Yes," Markus said.
"I knew Aurelian lineage practitioners," Vorash said. "In the period before the mana event. Before the fracture." He looked at Markus with the specific quality of something reckoning with a coincidence that was not a coincidence. "Your grandmother carries that lineage."
"She does," Markus said.
Vorash looked at the construction.
"Bring her," he said. "The archive is open. Whatever she needs."
Markus opened the communication channel to the Aurelian estate.
Isolde answered on the second signal.
"I need you here," he said. "I'm sending the spatial coordinates. Bring the Tier 7 core compound and whatever archive material you've been working with on the construction-scale application. Sloane can hold the academy work."
A pause.
"How complicated is it," she said.
"Extremely," he said. "And not in the way we expected."
Another pause.
"I'll be there in four hours," she said.
He closed the channel.
Outside the citadel, the manufacturing sector's entity production was running at the rate it had been running for twenty-five years — the corruption doing what it had been introduced to do, weapons being manufactured and aimed at a boundary that the entity who had built the apparatus had not intended and could not stop.
The third party's construction was operating.
He did not know what the third party's objective was beyond preventing Vorash from leaving.
He was going to need to understand that before the bridge was complete.
He filed this at the level of urgency it deserved and turned to the work immediately in front of him: explaining the citadel's full situation to Rosanne so she could build the operational plan for the next several weeks.
She already had the notebook open.
He began.