"A fascinating lecture on mechanical engineering, Vance," Thorne’s amplified voice rolled down from the heights, cold and resonant like iron struck on an anvil. "Pity you won't live to publish your findings in the Guild gazette."
Silas shoved Vesper behind a massive bronze counterweight pillar as a volley of high-velocity lead rounds shrieked across the platform. The bullets ricocheted off the ancient alloys with dazzling showers of white sparks, chewing deep gouges into the stone balustrades but leaving not a scratch on the speculum metal.
"How did you get down here?" Silas shouted over the roar of the gunfire, peering around the edge of the pillar. "The brine cistern was sealed from the inside!"
"Did you truly believe your pathetic master was the only one who kept maps of the old drainage mains?" Thorne sneered as his men advanced down the spiral service stairs that clung to the cavern wall. "The Guild belongs to the High Archon, boy. Every brick, every pipe, every miserable wretch breathing coal dust belongs to the state. When Linus lost his third finger, he became remarkably cooperative."
Silas felt his stomach drop into a pit of cold bile. Linus. The old man had broken. He couldn't blame him—not against Thorne’s systematic cruelty—but the betrayal closed their last escape route. There was no going back up.
"He wants the Core, Silas," Vesper whispered against his shoulder, clutching the brass sphere to her breast. Her wound had opened again; fresh blood was soaking through her gray tunic. "If he gets it, Sterling will activate the Primary Loom from the High Spire within the hour. We have to reach the cradle."
Silas looked out at the floating crystal cradle in the center of the cavern.
Between the observation platform and the central mechanism lay fifty paces of empty air, suspended above the silent, churning sea of liquid mercury. The only connection was a single, arched catwalk of latticed bronze, no wider than a man’s forearm, which served as a calibration track for the planetary rings. It was currently spinning in sync with the secondary drive shafts, tilting thirty degrees with every sixty-second cycle.
"That track isn't a bridge, Vesper," Silas said, his eyes measuring the speed of the rotation. "It's an alignment rail! If you miss your footing, you fall into the mercury pool. The vapor alone will kill you, and the surface density will shatter your spine like striking solid granite!"
"Then don't miss," she said, her amber eyes burning with an unreasonable, incandescent fire.
She didn't wait for his consent. Slipping out from behind the pillar, Vesper sprinted across the open platform, her boots flying over the brass grates.
"Fire!" Thorne barked from the stairs.
A sniper's slug tore through the sleeve of Vesper's coat, grazing her shoulder and throwing her off balance. She stumbled, fell to her knees at the edge of the drop, the Chronos Core slipping from her hands. The brass sphere rolled across the edge, tumbling toward the dark abyss below.
"No!" Silas screamed.
He threw himself forward, sliding on his knees across the polished bronze deck. His left arm shot out over empty space. His fingers grazed the cold metal of the sphere, snagging it by one of its micro-rings just as it tipped into freefall. The kinetic weight almost pulled him over the precipice, his chest slamming hard against the outer rim of the platform.
He looked down. Below him, the vast expanse of liquid mercury mirrored the spinning wheels like a sheet of dark, mercurial ice.
A shadow fell over him.
Silas rolled onto his back just as a heavy, iron-shod boot came crashing down where his skull had been an instant before. The impact cracked the stone trim of the balustrade.
Thorne stood over him, his aether-saber raised high. The blade hummed with an ear-splitting frequency, casting an eerie, violent glow over his obsidian cuirass. His visor was pulled back, revealing teeth bared in a feral grin of triumph.
"Hand it over, grease monkey," Thorne hissed, the tip of the plasma blade hovering three inches above Silas’s throat. The heat radiating from the weapon scorched the young mechanic's skin, curling the hairs on his collar. "Give me the Core, and I will let the girl die quickly."
Silas looked into Thorne’s eyes—eyes that had never seen a workshop from the inside, eyes that had never watched a comrade die of furnace lung, eyes that saw the entire working population of Oakhaven as mere fuel to be fed into the furnaces of the elite.
"You know, Thorne," Silas gasped, his fingers curling tightly around the Core, "for a man who works for the High Spire, you really don't understand basic leverage."
With his right hand, Silas reached down to his tool satchel, which lay wedged between his hip and the balustrade. He didn't pull a wrench. He pulled his heavy, hardened-steel scrap-scraper—the one he had ground to a razor-sharp chisel point.
He didn't strike at Thorne’s armored chest. He jammed the hardened steel wedge directly into the bypass lubrication port on Thorne’s hydraulic knee actuator.
Crrk-snap.
The high-pressure hydraulic line ruptured with a violent spray of red mineral oil. The sudden loss of pressure caused the knee joint to seize instantly. Thorne’s right leg buckled beneath him with a sickening mechanical clatter, throwing him off balance.
The Praetorian lieutenant roared in fury and pain as he pitched forward over the low railing. He managed to drive the tip of his aether-saber into the bronze decking, the blade melting through the ancient metal like hot butter, arresting his fall. He dangled precariously over the mercury sea, supported only by the hilt of his weapon and his one good leg.
"Shoot him!" Thorne shrieked to his men on the stairs. "Shoot them both!"
The guardsmen leveled their rifles, but they hesitated; Silas was now standing directly in front of their dangling commander, using Thorne's armored bulk as a human shield.
Silas reached down, grabbed Vesper by her uninjured arm, and hauled her to her feet.
"The rail!" Silas yelled over the roar of the steam rifles that began to chatter from the flanks. "Now!"
Holding the Core tightly between them, they stepped onto the spinning, narrow bronze calibration track just as the primary alignment ring swung into position.