The Administrator did not send men to the Gate. Men were prone to doubt, to sentiment, and to the psychological collapse that came with standing against their own kind in the dark. Instead, the Aether-Wing deployed the "Seeker-Drones"—unmanned, high-level aerial combatants that looked like mechanical dragonflies forged from polished silver and sapphire glass.

  There were twelve of them. They descended through the transit shaft with a high-pitched, predatory whine that rattled the teeth of everyone in the tunnel. Their underside-sensors glowed with a harsh, ultraviolet light—a spectrum designed to track human heartbeat and metabolic heat through three feet of solid stone. In the stagnant air of the shutdown sector, every Laborer was a lighthouse.

  "Take cover!" Andy rasped.

  The Guardians and Laborers scrambled behind the heavy structural pillars and the obsidian slabs of the Gate, but the drones didn't care about physical cover. Their sensors were tuned to the bio-electrical signatures of the "assets." In the cold, unmoving air of the sector, the survivors were the only things emitting a thermal gradient.

  "They're locking on!" Vane yelled, his voice tight. A sapphire beam of light swept across the floor, pausing briefly on Kaelen’s trembling boots. The drone hovered, its flight-fins micro-adjusting for a lethal discharge.

  Andy looked at the primary steam-bypass valve—a massive, iron wheel caked in layers of white calcium deposits and decades of oxidation. He knew the internal pressure of these pipes. Even with the primary pumps off, the residual thermal energy in the geothermal jackets was enough to create a localized atmospheric event if the pressure had nowhere to go.

  "Vane! The bypass wheel!" Andy pointed with his ruined hand. "Open it. Full rotation. Now!"

  "If I open that, the secondary pressure will blow the seals!" Vane shouted back, but he was already moving, his engineering mind recognizing the physics Andy was trying to exploit.

  "Not if we move to the intake-vents," Andy said. He watched the drones. They were leveling their underside-cannons—small, focused mana-pulsers designed for surgical liquidation. "The drones use ultraviolet and heat-gradient tracking. If we saturate the air with high-pressure vapor, their sensors will 'white out.' They won't be able to distinguish the heat of a human lung from the screaming heat of the steam."

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  Vane threw his weight against the wheel. It didn't budge. Two more Laborers jumped in, their feet slipping on the basalt as they fought the iron-seize. The first drone fired. A bolt of blue energy hissed through the air, vaporizing a hole in the stone inches from Kaelen’s head.

  With a shriek of protesting metal, the wheel turned.

  A wall of white, scalding steam erupted from the bypass vents. It didn't just leak; it roared into the tunnel, a pressurized cloud of mineral-rich vapor that turned the Gate of Separation into a world of white nothingness. The temperature jumped instantly, making the skin on Andy’s face tighten, but the moisture was the key.

  The drones faltered. Their sapphire sensors spun wildly, unable to process the total thermal saturation of the corridor. The UV beams scattered against the dense water droplets, creating a chaotic strobe effect that rendered their targeting arrays useless.

  "Move!" Andy commanded, his voice muffled by the fog. "Stay low to the floor! The vapor rises! Follow the sound of the intake-fans!"

  The combined force moved like ghosts. They weren't a formation anymore; they were a collective organism navigating by touch. Andy led them, his hand tracing the cold, vibration-less surface of the primary conduits. He could hear the drones above them, their wings buzzing frantically as they collided with the ceiling and each other, blind predators in a white-out storm.

  "Wait," Andy whispered, halting the line.

  He felt a different vibration—not the high-pitched hum of the drones, but a deep, rhythmic thudding from the walls. The System was trying to compensate for the "visual error" by using the Hub’s internal acoustics to triangulate their positions.

  Andy reached into his belt and pulled out a handful of copper shavings he’d scavenged from Harlen’s broken whip. He threw them into the intake-vent as they passed. The metal scrap hit the spinning blades of the secondary fans, creating a cacophony of screeching, metallic shrieks that echoed through the plumbing.

  The drones dived toward the sound, unleashing a barrage of mana-bolts into the empty machinery, wasting their limited battery-charge on ghosts of sound.

  "We’re clear," Andy said as they emerged into the secondary service crawlspace—a narrow, cramped tunnel that the drones were too large to enter.

  He slumped against the wall, his breath coming in shallow gasps. His mother knelt beside him, her face etched with a mixture of terror and awe. She looked at the white wall of steam they had just emerged from, then back at her son, who was bleeding and broken but still calculating.

  "You knew exactly how they would track us," she said.

  "The machine has a logic, Mom," Andy said, closing his eyes. "If you know the logic, you can make the machine lie to itself."

  But as the steam began to thin, Andy knew the victory was temporary. Blinding a few drones was a tactic. To survive the night, they needed a fortress. And in the Hub, there was only one place the Administrator couldn't reach without risking a total structural collapse.

  The Core-Chamber.