The compound application to a structure that had taken thirty years to build took four days to complete.
Not because the work was slow — the pace Isolde had calibrated against the decay cycle was as fast as the methodology allowed. Because the bridge's eight construction sections were not equal in size or in the depth of the corruption's integration. The first section, the material processing chambers where the tribute's refined mana had been converted for construction use, had the deepest corruption integration. It had been the first section to be infiltrated and had had the full twenty-five years of integration time.
The first section took eighteen hours.
He noted this against the decay cycle's timeline and Isolde recalibrated the compound's remaining concentration upward by eight percent. Not a crisis — the cycle had margin built in — but worth addressing.
Vorash directed the sequence. He had built the bridge in the specific order that its architectural logic required, and the extraction had to follow the same logic to avoid creating structural interference between the newly cleaned sections and the sections still carrying the corruption. He moved through the bridge's interior with the specific quality of returning to something he had been building across three decades and had never seen in its clean state.
He did not say this. It was readable.
The team maintained the operational rhythm around the application work.
Rosanne ran the perimeter monitoring and the communication schedule. The traffic on the schedule was significant: Valerian's office checking in daily with the precise schedule updates they needed to coordinate the Sector 12 deployment. Elena's archive team sending the final consolidated documentation on the Undoing faction's historical activity. Rael's channel carrying a brief acknowledgment that the Solarian Union's intelligence division had read the crossed transmission about the Undoing faction's possible interest in the framework's completion as a return pathway and would be sending a formal diplomatic inquiry to Valerian's office.
Sloane's message from the Aurelian estate arrived on the second day of the application.
The entrance assessment cohort submitted. Forty-one of forty-three cleared the baseline threshold. The two who didn't were sponsored candidates from minor houses who had apparently not received the information that the assessment was genuine rather than ceremonial. Their sponsors have been notified that a second application window will be available in four months.
The Grand Regent attended the first day of the assessment without announcement. He sat in the back of the observation gallery and watched the Vanguard Crucible trials. He left before the final candidates finished.
I asked his aide what the Regent's impression was. The aide said: "His Grace remarked that the academy appeared to be exactly what was described and that he had been uncertain whether to believe the description."
We are building something correct here. Come back when you can.
He sent back: Soon. The application is proceeding. The transition to the framework side is in two days.
Sloane sent: Send word when you're at Sector 12. We'll be watching the channel.
The third section's corruption had a specific character different from the others.
He read it as he applied the spatial law extraction — the compound doing its disruption work, the coordinate relationships addressing themselves sequentially as the disruption allowed. The third section was the bridge's primary spatial architecture, the component that established the connection between the primordial world's coordinate system and the framework world's coordinate system.
The corruption here had been introduced differently from the other sections. Not distributed through the material during construction, but woven into the existing spatial coordinates after the architecture was in place. The infiltration had been more skilled than the other sections required — the work of someone who understood the spatial law's coordinate architecture at a functional level.
He flagged this and told Vorash.
"The third section required the most sophisticated infiltration work," Vorash confirmed. "I noticed this when I first identified the corruption ten years ago. Whoever introduced it understood spatial law at a level equivalent to my own."
"The Undoing faction's practitioner-level capability," Markus said.
"Or a proxy they had trained," Vorash said. "I do not know which."
He noted this and sent it to Elena's archive team. The specific sophistication of the third section's infiltration was a signature. If the Undoing faction or their proxy appeared elsewhere, the methodology would be recognisable.
The sixth section had the specific quality he had been building toward in the temporal understanding: the bridge's calibration chamber, where Vorash had been performing the geometric alignment work that the bridge's final activation required.
The calibration chamber was where the bridge's spatial architecture interfaced with the temporal anchor's coordinate. It was the point of contact — the section that was supposed to be clean when the integration occurred.
The corruption here was the thinnest of any section. The Undoing faction had not heavily infiltrated the calibration chamber because heavy infiltration would have prevented the calibration work, which would have prevented the bridge from progressing toward completion, which would have reduced the ongoing boundary degradation they needed.
They had introduced just enough corruption to interfere with the calibration's precision — causing the degradation Vorash had described, where each advance was partially undone — without stopping the calibration entirely.
The application to the sixth section was the most precise work he had done since the Saylor extraction.
Not because it was technically the hardest. Because the calibration chamber was the section whose cleanliness directly determined whether the integration could occur correctly. He spent six hours on it rather than the four the section's size would have suggested. He ran the Fate's Eye's read at every stage.
When it was done, the section was clean at the level the construction's original specifications required.
Isolde looked at the Fate's Eye's final assessment when he reported it.
"That's the cleanest section in the structure," she said.
"Yes," he said. "It needed to be."
She made the note.
The eighth section completed on the fourth day's evening, as the three suns were settling toward the western mountain formations.
The bridge's complete spatial architecture, for the first time in twenty-five years, was running without the corruption's interference.
Vorash stood at the inner chamber's threshold and read the structure.
He was quiet for a long time.
What he was reading, Markus understood, was not simply the confirmation of the extraction's success. It was thirty years of work seen clearly for the first time — the construction he had built across three decades finally existing in the state it was designed to be in.
"It's correct," Vorash said. His voice had the specific quality of a statement that was also a confirmation that he had not been certain he would ever be able to make.
"Yes," Markus said.
Another silence.
"The calibration can proceed now," Vorash said. "Without the interference. The geometric alignment can be established cleanly." He looked at the bridge's geometric core. "How long the final calibration requires depends on your timeline."
"The transit to Sector 12," Markus said. "The Valerian side. We need to be in position at the temporal anchor before the bridge is operational. The calibration's final alignment and my integration at the anchor have to be simultaneous."
"Then I will maintain the calibration at its current stage until I receive your confirmation that you are in position," Vorash said. "And complete the final alignment on your signal."
"Yes," Markus said.
He looked at the construction — clean, intact, the thirty years of Vorash's work present in it without the corruption's overlay. A structure built by an entity trying to go home, infiltrated by someone trying to prevent it, cleansed by an alchemist whose ancestors had worked in the same construction language.
"Thank you," Vorash said. Not to any specific person — to the work, and to the people who had done it.
Isolde accepted this with the specific grace of someone who understood when thanks were the accurate expression of something real.
"The compound will be completely inert within thirty-six hours," she said. "By the time the crossing occurs, the decay cycle will have completed."
"Good," Vorash said.
They transited the following morning.
The spatial fold from the citadel to the framework side was the longest single fold Markus had established — the primordial world's distance from the Sector 12 Abyssal Trench, through the megalithic arch's coordinate, back to the framework world.
He established it carefully.
The team came through first. He waited while each of them crossed and confirmed the arrival, the spatial sense tracking each signature through the fold until they were stable on the framework side.
Then he looked at Isolde.
"The academy," he said.
"The academy is in Sloane's capable hands," she said. "I will go back to it when this is done." She looked at him steadily. "I came here for this part. I am not leaving before it."
He looked at Vorash.
"When we are in position," he said. "I'll send the signal through the bridge's architectural channel — the spatial sense connection to the calibration chamber. You'll feel it."
"I will feel it," Vorash confirmed.
He crossed.
The Abyssal Trench received him in the specific way he had read it the first time he came through, going the other direction: the cold, the depth, the megalithic arch's gold-and-iron aura present and patient.
The temporal anchor beneath the permafrost, the Fate's Eye reading it clearly.
The team was arranged around the arch's perimeter. Rosanne at the anchor's direct line. Mika and Jessica at the flanking positions. Donna reading the ambient temporal signature through the Ghost Sense architecture.
Isolde stood to the side, her compound work complete, her role in what came next observation and documentation.
Nagini coiled at the crown of his head.
He stood at the arch's threshold, the temporal anchor beneath him, the spatial sense extended to its full radius across the coordinate system.
He looked at Rosanne.
She had the notebook.
"Ready," she said.
"Ready," he confirmed.
He sent the signal through the bridge's architectural channel.
And waited for Vorash's calibration to complete.