The air inside the abandoned smelting yard of Sector 13 tasted of cold ash and rancid oil. It was a massive, hollow cavern of dead industry, where the skeletal remains of heavy iron-alloy cranes hung from the ceiling like rusted gibbets. Far below, pools of black, crude hydraulic oil had leaked from cracked machinery, forming stagnant, dark mirrors that reflected the flickering, weak blue light of Marcus’s calibrated but severely depleted sapphire G-Core.

Marcus sat in his manual wheelchair, his teeth clenched so hard his jaw ached. Every breath was a slow, deliberate struggle against his cracked ribs and broken right collarbone. His left leg, fifty percent calcified and locked straight out like a useless iron rail, rested heavily on the rusted footrest. He could feel the cold, creeping weight of his own bones turning to stone—the Calcium Calcification Threshold was no longer a distant medical warning; it was a physical reality eating away at his remaining humanity.

"Keep your head still, Marcus," Hana whispered. Her voice was thin, strained by exhaustion and the lingering grief of Silas’s death, but her hands were steady. She adjusted her protective leather welding goggles, their dark lenses reflecting the bright, blue-white glare of her high-frequency plasma torch.

Projections from Silas’s Legacy Blueprints flickered in the dark from Clara’s Data-Slate, casting a pale blue wireframe grid across Marcus’s bare chest and shoulders. The schematics were beautiful in their brutal, utilitarian simplicity—a blueprint for a heavy, kinetic-absorbing steel frame designed to clamp directly onto a pilot’s skeletal structure, multiplying physical leverage where the natural body had failed.

"The anchor bolts are going into the collarbone plates now," Hana warned, her soot-stained cheeks tightening. "I’ve reinforced the shoulder mounts with Scrap Steel Plating to distribute the weight, but when the pneumatic valves ignite, the vibration is going to go straight into your skeleton. You have to stay absolute still."

"Just do it, Hana," Marcus rasped, his voice a dry, gravelly scrape. He looked across the dark smelting yard toward the low cot where Clara lay. His fourteen-year-old sister was resting under a pile of dirty, lead-lined canvas, her breathing shallow and wet. Dr. Evelyn Vance stood over her, her silver-framed spectacles catching the dim light as she adjusted a manual oxygen pump. The forty-eight hour clock was ticking. They had no Cal-Stab left, and every minute they spent in this high-gravity tomb was suffocating his sister. "We don't have time to worry about my bones."

Hana set her jaw, lowered her goggles, and triggered the torch.

*SHHHHHHH—*

A blinding, white-hot needle of plasma fire hissed into the dark. The smell of burning flux, melting zinc, and singed flesh instantly filled the air. Marcus’s eyes widened, his fingers digging into the rusted armrests of his wheelchair as the first heavy steel anchor plate was bolted directly to his broken right collarbone. The heat was a living beast, searing through his skin and muscle, but the physical shock of the high-frequency vibrations was worse. It traveled down his spine like a series of rapid, agonizing electric shocks, rattling his fractured ribs and sending a fresh, warm trickle of blood from his nose.

He didn't scream. He bared his teeth, his vision flickering into gray static as his calibrated sapphire G-Core flared in protest, its blue light pulsing in sync with his racing heartbeat.

"Almost there," Hana muttered, her forehead glistening with sweat as she worked with frantic, precise speed. She used her precision welder to fuse the heavy iron leg-braces along his paralyzed thighs, connecting them to the central spinal brace with thick copper cables. "Connecting the hydraulic oil lines. Jax, I need the grease."

Jax stepped forward from the shadows, his massive, bald head glistening under the dim green glow of the phosphor fungi. His left forearm, shattered by Captain Vane's hydraulic ram, was bound tightly to his chest in crude canvas splints, but he used his single good arm to lift a heavy canister of Crude Hydraulic Oil, pouring the thick, black lubricant into the frame’s primary steam pistons.

"The seals are tight, pilot," Jax grunted, his deep voice carrying a heavy, protective warmth. He looked down at Marcus, his eyes filled with a mixture of respect and deep-seated anger. "Silas knew what he was doing. This frame... it’s heavy, but it’s solid. It’ll hold you upright."

"Let's find out," Marcus gasped, his chest heaving as the heat from the fresh welds slowly dissipated.

He placed his hands on the manual switches on his belt. The mechanical frame felt like a cold, iron cage wrapped around his broken body, adding a massive physical weight to his paralyzed limbs. Under the Silt's artificial 2G gravity, the downward drag was immense, pressing the steel plates hard against his seared collarbone.

"Triggering the pneumatic steam valves," Marcus said, his finger hovering over the toggle.

*CLACK-CLACK. HISSSSSSS.*

The steam pistons along his legs roared to life, venting a thick cloud of wet, metallic-smelling steam. The iron braces clamped around his thighs and shins locked upright with a violent, mechanical snap, forcing his paralyzed legs to stand.

Marcus stood. For the first time in months, he was upright, his head level with Jax’s chest. But the physical cost was immediate and devastating. The violent vibration of the locked hydraulic pistons traveled straight up his legs, finding the structural weak points in his skeleton.

*CRACK.*

A sharp, sickening sound echoed through the quiet smelting yard. Marcus let out a strangled gasp, his knees buckling as a fresh fracture tore through his right shin bone under the raw, unyielding pressure of the iron braces. The heavy 2G gravity pulled his massive steel-plated frame downward, threatening to crush his remaining natural leg joints into dust.

"Marcus!" Hana cried, reaching out to support his waist, but the sheer weight of the scrap steel armor was too much for her to lift.

"Don't touch me!" Marcus roared, his face contorted in absolute agony. He was hanging suspended in his own armor, his broken bones grinding against the cold iron plates. "I can't... I can't walk like this. The downward drag is too heavy. The frame is crushing my own legs."

"The pressure is too high," Jax growled, his hand tightening around his kinetic rifle. "Hana, we have to adjust the valves, or he'll shatter his own hips before we even reach the transit station!"

"I can't adjust the pressure without reducing the torque!" Hana cried, her fingers flying across the frame’s manual diagnostic panel. "If I lower the steam, the pistons won't have the strength to lift the steel plating under 2G gravity! He’ll be trapped upright, unable to move at all!"

Marcus stared down at his locked, vibrating legs. His vision was blurring, the blood from his nose dripping onto the cold steel collarplate of his armor. He looked at Clara, whose small chest was rising and falling in shallow, desperate gasps. Forty-eight hours. They had no time for gradual adjustments. They had no time for safety.

"Silas’s blueprints," Marcus whispered, his teeth stained red. "There’s a bypass. Hana... the red manual switch on the primary steam conduit. Flip it."

Hana’s eyes widened behind her soot-smeared goggles. "The Hydraulic Overload Bypass? Marcus, no! Silas’s notes said the bypass is a double-edged sword. It redirects the entire steam pressure to double the physical output, but it only lasts for thirty seconds! If you maintain it for a second longer, the hydraulic seals will melt, and the frame will permanently lock your legs upright!"

"Flip it," Marcus commanded, his voice cold, flat, and absolute. "I don't need to walk. I just need to leap."

Hana hesitated for a fraction of a second, looking at Clara’s pale face, then at Marcus’s unyielding, desperate eyes. With a trembling hand, she reached beneath his left hip and threw the heavy, red manual switch.

*ROAR—*

The smelting yard erupted with the screaming hiss of super-heated steam. A massive, choking white cloud vented from Marcus’s leg pistons, obscuring the dark cavern in a dense, hot fog. The crude hydraulic oil inside the lines began to boil, the pressure gauges on his wrist-mount instantly spiking into the red zone.

Marcus felt a sudden, terrifying surge of mechanical torque rip through his legs. The iron braces didn't just hold him upright; they vibrated with a wild, violent energy that threatened to tear his muscles from his bones. The heat along his thighs was agonizing, burning through his trousers and blistering his skin, but his paralyzed legs were suddenly light, propelled by raw, high-pressure steam.

"G-Core... sync," Marcus gasped, his mind locking onto the sapphire light pulsing behind his spine.

He didn't attempt a step. Instead, he bent his knees slightly, letting the hydraulic pistons absorb the downward drag of the 2G gravity. He focused his mind, aligning the frequency of his newly calibrated core with his personal mass, reducing his effective weight to near-zero.

*Gravity-Assisted Jump active.*

Marcus leapt.

*BOOM.*

The concrete floor beneath his feet shattered as the high-pressure steam pistons discharged their entire torque in a single, explosive burst. Marcus launched into the air like a meteor, flying thirty feet upward into the dark rafters of the smelting yard, completely bypassing the heavy downward pull of the Silt.

For a brief, weightless second, he was a pilot again. The dark, cold ceiling of the cavern rushed toward him, and he felt the familiar, exhilarating rush of absolute freedom. But as his trajectory peaked, he shifted his gravity vector, increasing his personal mass to five times its natural weight as he targeted a massive, solid concrete pillar on the far side of the yard.

He came down like a falling anvil, his heels striking the center of the pillar.

*CRASH!*

The solid concrete column pulverized upon impact, exploding into a cloud of gray dust and gravel as Marcus’s heavy steel boots drove through the structural stone. The immense kinetic shockwave of the landing traveled up through his leg braces, but instead of shattering his bones, the newly calibrated hydraulic pistons compressed, absorbing eighty percent of the impact force in a loud, rhythmic hiss of steam.

Marcus slid to the ground, his boots sinking into the concrete debris. He was standing upright, his chest heaving, his body covered in soot and boiling hydraulic oil, but his skeleton was intact. The prototype combat frame had held.

"It worked," Hana gasped, dropping her welding torch as she stared at the shattered pillar in absolute awe. "The calibration... it held."

Marcus looked down at his legs. The red bypass switch was still active, the pressure gauges slowly dropping as the thirty-second limit approached. But as he tried to shift his weight, he realized the terrifying truth. His natural, paralyzed leg muscles had been completely deadened by the intense heat and physical trauma of the test. He could no longer feel his feet at all. His remaining natural leg function was completely destroyed; he was now a permanent passenger inside Silas’s iron machine.

He didn't care. He looked at his hands, which were trembling but steady, and felt the immense, mechanical leverage of the frame wrapped around his spine. He was ready to fight.

*BANG!*

The heavy iron double doors of the smelting yard were suddenly thrown open.

Jax burst through the threshold, his face pale, his breath ragged as he dragged his heavy borer drill behind him. His single good arm was shaking, and his eyes were wide with a cold, terrifying panic.

"Marcus!" Jax roared, his voice echoing through the hollow cavern like a death knell. "We have to move! The Red Enforcers... they’ve just breached the outer gates of Sector 9! They’re not conducting scans anymore, pilot. They’ve begun a systematic, house-to-house liquidation sweep of every resident in the sector!"