The Magnesium Lance

"Firing!" Maca called out.

She struck a friction match against her zinc shears and touched the sulfur head to the magnesium wire at the nozzle tip. The magnesium erupted into a brilliant, blinding white glare that threw harsh, skeletal shadows across the steel chute.

Maca aimed the lance straight down the throat of the rock chute and pulled the brass trigger full back.

The fifty-pound charge of phenol-sulfur wash erupted from the nozzle in a concentrated, pressurized jet. As the atomized mist passed through the intense thermal envelope of the burning magnesium, the chemical mixture ignited into a roaring, jet-like stream of liquid fire.

The lance thrummed violently in Maca’s grip, the recoil jarring her wrists and collarbone. A brilliant column of orange and violet flame roared thirty feet down the steel flume, striking the colonial spore cluster dead center.

The reaction was instantaneous and violent.

The pale fruiting bodies did not have time to rupture into airborne dust. The intense, concentrated heat instantly vaporized their internal moisture, causing the pods to pop with sharp, wet cracks like roasting chestnuts before collapsing into black, carbonized slag. The thick, felted mycelial mats that anchored the colony to the steel baffle sizzled, curled, and shrank into brittle ash. The roaring chemical flame burned out the moisture and grease, clearing the hydraulic mechanism in a furious wave of sulfurous smoke and crackling heat.

Maca released the trigger. The flame snapped out with a sharp pop of displaced air, leaving the magnesium tips smoldering in the dark.

Down in the chute, the obstruction was gone. The steel flume was clear, its metal walls glowing a dull, smoking red where the flame had scoured the surfaces clean. The heavy iron diversion baffle, freed from the choking fungal roots, dropped open under its own counterweight with a resounding iron clang that echoed down into the depths.

"Path's open," Maca said, coughing once against the sharp sulfur fumes and shaking out the stiffness in her wrists.

Behind them, the brass laboratory door groaned as the pry-bar bent forty-five degrees under an external sledgehammer blow. A heavy canvas-gloved hand reached through the breach, fumbling for the latch.

"In," Pacha-illa said, his deep voice leaving no room for hesitation. "You first, Medic. I'll ride the drag behind you."

Maca did not waste a breath arguing. She slung her surgical satchel tight against her chest, wrapping both arms around the leather pouch to protect the copper data spool and glass specimen jars. She sat on the lip of the chute, planted her heavy work boots on the scorched steel, and shoved herself forward into the dark.

Gravity took her instantly.

The descent was a deafening, bone-jarring rush. The steel plates of the flume were polished smooth by years of tumbling ore, slicked with a film of condensed moisture and cooling sulfur ash. Maca leaned back, digging the reinforced heels of her boots against the corners of the rectangular shaft to check her speed. Sparks sprayed from the iron cleats in her soles, casting stuttering orange flashes across the seamless rock and metal whizzing past her shoulders.

The chute twisted sharply to the right. The lateral force slammed her left shoulder against the steel plating with enough force to knock the wind from her lungs, but she kept her arms clamped tight around her satchel. Above her, the booming roar of Pacha-illa’s descent echoed down the tube like a runaway mining cart, the iron pry-bar scraping along the steel ceiling in a continuous shriek of friction.

A sudden draft of boiling, oily air hit her face as the chute leveled slightly, then plunged into a near-vertical drop.

Through the darkness below, a sliver of dull yellow light appeared.

Maca saw the lower discharge throat rushing toward her—a heavy, hanging flap of reinforced manganese rubber designed to slow falling ore before it hit the hopper floor. She braced her knees, tucked her chin against the collar of her jacket, and hit the rubber flap at full speed.

The heavy rubber slapped hard across her back and ribs, absorbing the momentum of her slide before tearing open. Maca tumbled out of the chute's mouth, rolling across a deep bed of crushed limestone gravel and coming to rest against the cold iron flange of a structural pillar.

A split second later, Pacha-illa burst through the rubber flap with the roar of a falling boulder, plowing through the gravel and sliding to a halt six feet to her left, the brass sprayer clattering against his iron bar.

For several seconds, neither of them moved. The only sounds were the harsh, ragged rasp of their breathing and the deep, industrial thrum of heavy machinery vibrating through the concrete floor.

Maca sat up slowly, running her fingers over her ribs. Bruised, but intact. She quickly unbuckled the satchel flap and checked the contents. The glass specimen vial was unbroken, cushioned by her roll of sulfur gauze. The heavy copper data spool sat undamaged in its pocket, its cold metal surfaces unscratched.

She stood up, shaking the gray gravel dust from her wool coat, and took in their surroundings.

They were no longer in the ruined, fungal decay of Sector Four.

They stood on the reinforced iron mezzanine of a vast, cathedral-like industrial basement. Above them, massive overhead pipes wrapped in white asbestos insulation ran in parallel rows toward a distant vaulted ceiling, hissing with high-pressure steam. Heavy cast-iron turbine housings, each the size of a two-story tenement, throbbed with low-frequency power, driving the primary ventilation and electrical grid of the settlement.

The air here was hot, dry, and thick with the scent of machine grease and refined zinc slag.

Mounted on the concrete wall directly opposite their discharge hopper was a painted cast-brass bulkhead plate, its raised letters gleaming under the yellow cage lights:

KILLAR-QA EXTRACTION CONGLOMERATE

ADMINISTRATIVE SPIRE — SUB-LEVEL 01

PRIMARY TURBINE AND MONITORING BAY

Maca looked at the large mechanical shift clock mounted beside the main steam gauge. The heavy iron hands pointed precisely to twenty-three minutes past ten.

Less than one hundred and thirty minutes remained before the automated purge valves opened to vent the deep drifts into the town’s residential flues. But they were no longer trapped behind the quarantine seals of Drift Six. They were standing directly beneath the Spire, with Sapay-qa’s private harvest records secured in her satchel, and the primary ventilation control manifold sitting less than fifty yards down the catwalk.

Pacha-illa rose to his feet, wiping a streak of black grease and sweat from his forehead with the back of his forearm. He looked at the massive brass turbine housings, then down at the iron pry-bar in his hand.

Maca stepped to the edge of the mezzanine railing, her fingers resting lightly on the cold iron. The floor beneath their boots hummed with the steady, unrelenting rhythm of the company’s heart, and for the first time since the shift began, the path forward led directly into the overseer’s house.