The gate had been in the northeastern volcanic terrain for what the geological integration suggested was approximately eight years — one of Vorash's earlier conversion projects, at the stage where the standard red gate morphology had fully converted to the void-adjacent black gate signature that the Catalyst programme had been designed to address.
He had found it during the survey north, flagged it, and returned when the three of them were ready.
Ready, in Sloane and Isolde's case, had required three weeks.
He had watched the process with genuine attention. The initial acclimatisation had gone the way the compound's design predicted: the adaptation painful in the specific way that channel walls building new tolerance were always painful, and genuine rather than performed, and producing something real on the other side of it. By the end of the first week they were operating in the primordial atmosphere without the compound's active support, which was the intermediate adaptation benchmark he had been tracking for the team across the same period.
Sloane's combat expression in the primordial world was different from what it had been in the framework. Not weaker — the fire law's raw expression was actually more powerful here, the pre-framework atmospheric density giving the plasma output a medium that amplified rather than filtered. But the control required recalibration, the same kinetic precision adjustments the team had worked through in the Low Ashen Steppes, adjusted for a practitioner whose fire law was at the sovereign level rather than the Tier 4 proficiency level.
Sloane had recalibrated faster than his grandchildren had. Sixty years of combat experience gave him a relationship with his own technique output that was different from practitioners who were still developing the instincts rather than refining them.
Isolde's wind law in this environment produced the specific phenomenon of low-pressure systems meeting the primordial atmosphere's density gradients — the effect was considerably more dramatic than framework wind law expression because the density differential it was working with was larger. The vortices she generated in field tests had been sufficient to restructure local terrain.
The combination: when Sloane's fire output met Isolde's compressed-air vortex, the hyper-oxygenated chamber produced plasma temperatures that the standard primordial world's threat population had no biological defence against. Not because the combination was novel — fire and wind had been combined before. Because in this atmosphere, at their tier, the product exceeded the established ceiling.
They had been practising it for a week.
The gate interior was what fully-converted black gates were: non-Euclidean spatial architecture, the dimensional boundary having been altered enough by the conversion process that the standard geometry's rules had weakened. Corridors that doubled back. Gravity orientation that shifted every few hundred metres.
He mapped it in real time through the spatial sense and fed the coordinate data to both of them continuously. Not tactical directions — just the map. They had enough combat experience to use a map without needing instructions attached to it.
The threat population had the specific character of entities that had been developing inside a fully-converted gate for eight years, absorbing the void-adjacent mana that the conversion had produced. Tier 6 classification by standard measures, but with the specific density differential of primordial-world-developed fauna augmented by eight years of void-mana absorption. Dense. Aggressive. Without the self-preservation override the wrath frequency produced — this population was simply what apex predators became when they developed in a space where the ceiling was very high.
The Wind + Fire combination handled them.
He collected the material. The high-grade cores, the unrefined primordial ore that the gate's geological environment had produced, the specimens that Isolde had flagged from outside for retrieval. He ran the spatial vacuum collection while they ran the engagement.
It was, he thought, the most efficient operational configuration he had run since the palace training grounds with the team two years ago. Different scale, different environment, but the underlying dynamic was the same: people who were very good at what they did operating at the appropriate level while he handled the spatial architecture.
The chamber at the gate's interior base was what the map had indicated: the boss node.
The Calamity Sovereign was a Tier 7 entity — the specific classification for a being that had developed inside a converted gate at this level of void-mana saturation for an extended period. Its armour was hyper-compressed cosmic obsidian, the six-arm configuration unusual enough to indicate something genuinely different from standard gate sovereigns. The gravity well it maintained as passive defence was the spatial law's signature — not Vorash directly, but the void-adjacent energy the gate had been saturated with producing entities that used spatial-adjacent mechanisms.
He read the gravity well through the Fate's Eye and found the thing he was looking for: the well was generated actively rather than passively, which meant it had a generation cycle, and the cycle had a phase in which it was less dense than at others.
He told Sloane and Isolde.
They ran the combination at the cycle's trough.
The sustained Fire + Wind output over seven minutes cost Sloane and Isolde significantly — he watched their reserves declining through the Fate's Eye's read and noted when they were approaching the margin where the next phase required his intervention.
The sovereign's armour was through. The core was exposed. But the remaining capacity had activated the final-phase response: the void-mana in its core beginning to destabilise toward a self-detonation that would produce a spatial collapse across the chamber's dimensional architecture.
"I have it," he said.
He didn't need them to hold the line while he rested. He needed them to step back before the detonation radius reached them.
They did.
The Temporal Slash's application was precise. The Fate's Eye's read of the sovereign's chronological echo showed the specific moment three seconds prior when the armour had failed — the gap between the armour's defeat and the detonation sequence's initiation, the window in which the entity had been fully exposed before it began the countermeasure.
He cut the echo.
The past-wound manifested in the present with the specific quality of a causality paradox resolving toward the more energy-efficient solution: the wound existed in the past, therefore it existed now, therefore the detonation sequence was being initiated by an entity that had already lost the structural coherence required to complete it.
The sovereign collapsed.
He caught the Tier 7 core before it reached the floor, because it was the most significant specimen he had retrieved in this world and it was worth the effort of the catch.
Sloane and Isolde were at the chamber's edge when he came to them. Breathing heavily. The mana reserve cost of seven minutes at full sovereign-tier dual-law output was significant regardless of sixty years of experience.
"What did you do at the end," Sloane said.
"Time law application," Markus said. "I targeted a chronological echo rather than the present position. The wound manifested in the present because it existed in the past."
Sloane looked at him with the expression he used when he had received information that required processing beyond his current reference frame.
"That's new," he said.
"Yes," Markus said.
Isolde had come off the wall and was looking at the core in his hand with the scientific assessment she brought to all novel materials.
"The Tier 7 void-mana saturation signature," she said. "That's what the source crystal's architecture would have produced if it hadn't been extracted."
"Yes," he said.
"I need that for the counter-compound development."
"You have it," he said, and handed her the core.
She took it with the care of someone handling material they have been waiting for. Then she looked up at him.
"You look tired," she said.
"The Time law application is expensive," he said. "The comprehension level makes the cost non-trivial."
"Eat something," she said.
He was going to object that they were inside a collapsed gate structure with limited catering options, but the dimensional inventory had the Campeón contingency preparation that he maintained for exactly this category of situation.
"Yes," he said.
They found a stable section of the chamber and sat.
The gate structure around them was beginning its collapse process, which was what happened when a Calamity Sovereign's core was removed from an active conversion gate. He had twenty minutes before the spatial architecture would require them to be outside it.
Twenty minutes was adequate.
He ate and let his reserves recover at their own pace and watched Sloane and Isolde do the same, and thought about how many gates in the northern frontier territory needed the same treatment as this one, and about the citadel, and about what Isolde would build with a Tier 7 void-mana-saturated core as the primary material.
The work continued.
One gate at a time.