The transition from the outdoor Firing Range to the sulfur-choked abyss of Sector 4 was not a march; it was a slow, agonizing descent into a furnace.

Colonel Silas Finch had not allowed Marcus to step down from the cockpit. He had not permitted a single minute for the neural needles to be retracted from the base of his neck, nor had he granted Dr. Evelyn Carter the time to administer a stabilizing dose of synaptic fluid. Instead, the deployment order had been stamped with immediate corporate priority. The Argus-01’s heavy, bipedal mining chassis was forced to turn directly from the concrete parapets of the range, its joint hydraulics groaning in protest as it lurched toward the volcanic trenches of the southern sector.

Inside the cockpit, Marcus felt the full, unmitigated weight of his physical decay. The high-sync shot during the duel with Lieutenant Victor Vance had left his nervous system shattered. Severe tremors wracked his hands, causing his fingers to twitch uncontrollably against the manual control levers. A slow, warm trickle of blood ran from his left nostril, the metallic taste of raw copper and hot iron pooling on his tongue—the persistent, sickening backlash of the sensory bleeding.

But the physical pain was nothing compared to the psychological torment humming inside the neural conduits. Because he had traded his personal stash of high-purity copper scraps to the smuggler Nadia Petrov to secure the parasite’s fresh meat, the mecha’s neural conduits remained bare and un-patched. Without the high-conductivity shielding, the raw biological signals from the caged parasite behind his head leaked directly into his spine. Every twitch of the creature’s purple tendrils sent a needle-sharp shock of static directly into his optic chiasm.

His Outline Detection visual overlay was a glitched, shivering mess. Faint, green-tinted wireframe lines of the basalt cliffs flickered in his mind, distorting and dissolving like cobwebs caught in a storm. The throbbing migraine behind his temples was a physical hammer, beating a rhythmic, agonizing pulse that matched the low-frequency hum of the mecha’s geothermal reactor.

"Marcus, can you hear me?"

A young, crackling voice broke through the static of the short-range comms. It wasn't Evelyn's composed, clinical tone, nor was it Gidley’s gravelly bark. It was Toby. The scruffy, thirteen-year-old hangar apprentice was speaking from the auxiliary console in Hangar-Bay 9, his voice high-pitched with anxiety.

"I hear you, kid," Marcus rasped, his throat dry and coated in the bitter residue of sulfur. He reached into his pilot suit pocket, his shaking fingers brushing the rough, damp wool of his mother’s red scarf. The simple, tactile friction of the fabric was the only anchor keeping his mind from slipping into the parasite's feral, predatory hunger.

"The Colonel cut our main telemetry feed," Toby said, his words rushing out in a desperate scramble. "But I’m running a bypass through the old mining grid. Marcus, the leg hydraulics on the left side are leaking pressure fast. Gidley didn't get to patch the primary seal after the range run. If you take another high-recoil shot without bracing, the whole leg is going to buckle. And the external camera lenses... they're already taking damage. The sulfur gas in the vents is highly acidic today. It's eating the optical coatings. Your physical visibility is down by twenty percent and dropping."

"Copy that," Marcus said quietly. "Keep monitoring the joint stress, Toby. I’ll handle the recoil."

"You shouldn't even be out there," Toby muttered, his voice dropping into a fierce, protective growl that reminded Marcus of his deceased brother, Thomas. "The Miner's Union detail... they're trapped near the main pump. The garrison officers didn't even send an escort. They just left them."

Marcus knew the truth. The Dust-Anchor Miner's Union was a desperate, dust-lung-afflicted workforce, bound to Sol-Apex by generational corporate debts. To Finch, they were acceptable losses—numbers on a ledger. But to Marcus, they were the only real people left in this rusted outpost.

He forced the Argus-01 forward, descending into the thick, yellow haze of the Sulfur-Vents.

The air here was a living, hostile entity. A heavy, toxic fog of sulfur gas hung over the basin, so dense that it completely neutralized the mecha's standard optical sensors. Outside the metal hull, the volcanic vents roared, spewing plumes of superheated steam and yellow dust that hissed against the armored plating. The heat inside the cockpit rose rapidly, making the air thick and difficult to breathe. Marcus’s chest chest-rig felt like a band of hot iron tightening around his lungs. He reached up, checking his breathing mask; the Sulfur-Gas Filter Cartridge was already warm, vibrating softly as it struggled to neutralize the highly acidic air.

Without his acoustic visor, which was hanging uselessly around his neck, Marcus was forced to rely entirely on the glitched wireframe of the parasite’s link. The green lines of the basalt cliffs were almost entirely obscured by the yellow fog of the thermal signatures. The volcanic vents glowed as brilliant, blinding white smears in his mind, their intense heat throwing off the mecha's automated targeting systems.

"Automated guidance is completely offline," Marcus muttered, his voice flat. "The sulfur ionization is blocking the base's radar signals. I'm running manual."

"The mining detail is on the high basalt ledge," Toby’s voice crackled, distorted by the rising electromagnetic static of the storm. "Directly above the main lava fissure. Marcus, they were extracting Raw Sulfur-Ore when the clicking started. The drill vibrations... they must have called them. The vanguard is already in the basin."

Marcus adjusted his grip on the heavy control levers, his trembling hands slick with sweat. He could feel the parasite thrashing inside its biological containment cage behind him. The creature was hungry, its feral consciousness scratching at the edges of his mind, urging him to run, to hunt, to taste the iron-scented blood of the invisible predators lurking in the fog.

*Lower the pulse,* Marcus commanded himself. *Lower the heart rate. Become the stone.*

He initiated the Silent-Hunt technique. It was a slow, meticulous method Gidley had taught him during the early calibration trials. By manually regulating the hydraulic pressure in the mecha’s leg joints, Marcus could minimize the heavy, rhythmic thud of the bipedal machine’s steps. He timed each stride, matching the release of the pneumatic valves with the howling wind gusts of the sulfur storm.

The massive, rusted mecha slid through the yellow haze like a ghost, its heavy feet stepping silently onto the basalt ledges. He bypassed the lower volcanic fissures, calculating the structural stability of the stone based on the deep, low-toned resonance of the mining drills echoing through the rock. The weaker, hollowed-out basalt formations would crumble under the mecha's weight; he had to find the solid, iron-veined paths.

Through the glitched green wireframe, Marcus finally located the mining detail.

They were trapped on a narrow, high basalt ledge, huddled beneath the massive steel frame of a heavy geothermal drilling rig. A dozen miners, wrapped in tattered protective hazmat gear, were clinging to the support struts. Below them, a deep, glowing red lava fissure bubbled, casting a hellish, crimson light through the yellow fog. The miners' primary transport truck was overturned, its tires spinning uselessly in the red sand.

They were completely surrounded.

Marcus couldn't see the predators with his physical eyes, but through the parasite’s glitched thermal vision, he detected the faint, shifting ripples in the density of the fog. They were Feral Scouts—highly agile, low-level Phase-Shifters that hunted in packs. Their translucent hides refracted the light, making them invisible to the terrified miners, but the heat of their rapid, predatory breathing appeared as faint, purple-tinted smears moving along the sheer basalt walls of the ledge.

"They're circling," Marcus whispered into the comms. "Toby, tell the union crew to shut down the main drill. The vibration is keeping the scouts locked onto their position."

"I'm trying!" Toby gasped. "The comms are heavily jammed by the sulfur ionization. They can't hear me!"

Marcus raised the massive, shoulder-mounted Apex-90 kinetic railgun. The heavy steel barrel rattled against its damaged stabilization clamps. His hands were shaking so violently that the glitched wireframe of his targeting sights drifted across the basalt wall, unable to lock onto the shifting purple smears.

He took a slow, deep breath, holding the acidic air in his lungs until his chest burned. He focused on the rough texture of the red scarf in his pocket, using the memory of his mother’s voice to quiet the screaming static in his brain. He lowered his heart rate, waiting for the exact micro-second between his heartbeats to stabilize his aim.

Suddenly, the basalt floor beneath the mining rig shuddered.

A massive, violent seismic tremor ripped through the basin. The sheer force of the tectonic shift split the ground directly beneath the drilling rig, tearing the primary geothermal pump from its mountings.

*BOOM.*

The ruptured pump exploded with a deafening roar, releasing a massive, pressurized plume of superheated yellow sulfur gas that flooded the entire basin in a blinding, toxic cloud. The blast threw the Argus-01 back, its leaking left leg hydraulics groaning as Marcus struggled to maintain his balance.

Through the deafening roar of the escaping gas and the blinding yellow fog, a high-frequency, rhythmic clicking sound echoed from the darkness—the unmistakable, terrifying signature of the hunting pack closing in on the defenseless miners.