The train was picking up speed, gravity dragging the three loaded flat-cars down the eight-degree grade toward the amber and red lanterns of the checkpoint.
Beneath the deck plating, the iron brake linkage groaned as Varn threw his weight into the screw-handle on the lead platform, fighting to choke the train's momentum before it hit the turnout.
"We drop the hitch," Arin whispered.
Mira didn't ask how. She shifted her weight in the narrow gap between the fuel drums, her hand on her hilt, clearing space for him to move.
Arin pulled himself forward along the central spine of the carriage.
The clearance was suffocating. The cold, rolled-iron flanks of the naphtha drums pressed hard against his ribs, reeking of volatile petroleum. He crawled to the front lip of the third car, where the iron frame ended in a heavy, forged draw-bar connecting it to the middle dolly.
Between the two cars, three elements governed their motion:
* A heavy three-link iron coupling chain dropped over a vertical steel hitch-pin.
* A solid iron brake pull-rod running through an open guide-bracket beneath the draw-bar, transferring tension from Varn’s screw-wheel to Car 3's brake beam.
* The turnout switch, now less than forty paces ahead.
If Varn tightened that rod, all three cars would screech to a halt on the siding, boxing Arin and Mira inside an inspection trap.
Arin reached down between the vibrating buffer plates.
He reversed his grip on the Salvaged Pike Head, jamming the sharp, leaf-shaped iron blade directly into the gap between the brake rod’s clevis joint and the chassis frame.
He didn't try to sever the solid steel rod. He used the pike head as a high-tensile wedge.
Bracing his boots against the front bolster of the car, Arin drove his weight downward into the lever arm:
> [ISOMETRIC PRY: MECHANICAL INTERFERENCE]
> [CURRENT STAMINA: 92 → 82/105]
The forged iron socket bit deep into the chassis notch. The hardened blade jammed hard against the moving clevis, catching the pull-rod mid-stroke and locking it solid against the guide-bracket.
Up on the lead platform, forty feet ahead, Varn leaned into the screw-brake, expecting the iron shoes to bite.
Instead, the seized linkage snapped its cotter pin under the opposing loads.
The severed front rod whipped forward with a violent, hollow CLANG. The sudden loss of resistance sent the screw-handle spinning freely in Varn's grip, throwing the loader off-balance against the safety stanchion.
Varn screamed something lost to the tunnel wind, frantically grabbing at the spinning wheel.
The brakes were dead.
Deprived of drag, the first two cars surged forward, their wheels screaming as gravity hurled thousands of pounds of steel and fuel toward the switch.
Twenty paces to the turnout.
"The pin!" Arin barked over the roar of the trucks.
With the front cars surging ahead, the tension on the three-link coupling chain slackened for a fraction of a second.
Mira leaned over the buffer, her iron shortsword stabbing downward. The thick steel tip caught the underside of the vertical hitch-pin, popping it upward from the draw-bar socket.
Arin kicked the iron pin clear with the heel of his boot.
The heavy chain dropped, clattering violently across the ties.
Car 1 and Car 2 tore away, the gap between the carriages widening instantly—two meters, five meters, ten meters.
Car 3 was free. But on an eight-degree slope, an uncoupled flat-car loaded with twelve drums of naphtha doesn't stop on its own. It was still hurtling toward the switch at sprint speed.
Arin wrenched the pike head free from the sheared linkage bracket.
> [SALVAGED PIKE HEAD: DURABILITY 27 → 26/30]
He didn't drop it into the wheels. Jamming an iron wedge into a moving wheel flange at this speed would derail the car, rolling twelve barrels of fuel directly over their heads.
Instead, he jammed the heavy iron socket over the exposed end of Car 3's independent brake beam—the transverse iron bar that held the rear shoes away from the treads.
"Brace!" Arin roared.
He threw his entire torso backward, using the pike head as a lengthened manual lever, hauling the brake beam upward against the spinning iron wheel faces.
His upgraded Endurance anchored his spine against the violent torque:
> [LEVERAGE LOCK: MANUAL BRAKE APPLICATION]
> [CURRENT STAMINA: 82 → 68/105]
SCREEEEEEECH.
The cast-iron shoes slammed into the spinning steel treads.
A blinding curtain of orange friction sparks erupted beneath Car 3, spraying out from both sides of the chassis. The deceleration was brutal. The car bucked violently, throwing Arin forward against the base of the fuel drums as the iron wheels locked, skidding across the slick steel rails like an anchor dropped on stone.
Ahead of them, the nightmare played out in full.
Cars 1 and 2 hit the turnout at runaway velocity.
The front wheel flanges screamed as they took the curved switch, jumping the frog with a bone-jarring metallic crash. The two-car train careened straight off the main line, rocketing down the arrestor siding.
On the front platform, Varn made a desperate leap for the tunnel wall, hitting the stone flags in a tumbling ragdoll sprawl.
At the end of the siding, twenty paces past the switch, the three Vanguard sentries at the sandbag revetment barely had time to understand what was bearing down on them.
There was no negotiation. No demand for toll.
Twenty-four heavy steel drums loaded with high-volatility fuel smashed through the low slag arrestor bed without slowing.
The lead car slammed straight into the heavy timber buffer stops and the sandbag revetment at terrifying speed.
CRASH.
The impact sounded like a collapsing bridge. Structural iron buckled like cardboard; the heavy oak buffers pulverized into flying splinters. The violent deceleration sheared the hoop-bands holding the fuel drums, catapulting dozens of steel cylinders forward into the stone breastwork.
Barrels ruptured on impact.
A wave of pressurized liquid naphtha sprayed across the sandbag revetment, soaking the timber frames, the stone wall, and the sentries scrambling to flee.
Then the fuel vapor hit the open flames of the shattered kerosene lanterns.
FOOOOOOM.
The vapor didn't simply ignite. It flashed across the vault in a blistering sheet of fire.
A colossal wall of orange flame and oily black smoke erupted from the siding, expanding outward with a concussive shockwave that rattled the cast-iron tubbing of the entire tunnel. The blast-wind roared down the bore, stripping the hats from the dead and sending a blistering thermal wave washing over the tracks.
Fifteen paces short of the turnout, Car 3 finally ground to a dead stop.
The iron wheels sat smoking on the rails, the stench of scorched brake shoe and vaporized grease thick in the air.
Arin lay wedged between the barrels, his forearms locked over his neck as the blast wave swept overhead. The heavy steel drums on the front row took the brunt of the flying gravel and heat, shielding the recessed hollow where he and Mira lay.
A sequence of crisp, crystalline notifications scrolled rapidly across his retinas:
> [TACTICAL ENVIRONMENT OVERRUN]
> [HOSTILE FORCES NEUTRALIZED: 4]
> [INDIRECT COMBAT CAUSALITY CONFIRMED]
> [EXPERIENCE GAINED: 24]
> [EXPERIENCE: 24/120 TO LEVEL 4]
> [CURRENT HP: 84/125]
> [CURRENT STAMINA: 68/105]
Arin lowered his arms.
The siding was an inferno. A roaring wall of orange flame licked thirty feet up the basalt cliff, consuming the pulverized timber, the sandbag wall, and the mangled wreckage of the front cars. Through the deafening roar of the fire, thick, suffocating clouds of black petroleum smoke billowed toward the high ceiling, completely obscuring the checkpoint.
None of the four men on the siding were moving.
Beside him, Mira pulled herself up from the hollow. Her face was smudged with black soot, her eyes reflecting the dancing orange fire of the blast.
She stared past the smoking front lip of their carriage at the roaring destruction, then turned her head slowly to look at Arin.
A quiet notification chimed between them:
> [VARIABLE SHIFT DETECTED]
> [PLAYER: ARIN VALE ↔ PLAYER: MIRA]
> [CURRENT TRUST: 20 → 23]
> [STATUS: TACTICAL DEPENDENCE ESTABLISHED]
"You didn't just break the train," Mira whispered, her voice rough against the roaring draft. "You turned it into a siege engine."
"Stopping that mass by hand was impossible," Arin said, his breathing steadying as he pushed himself upright and retrieved the scorched pike head. "Directing it wasn't."
He stepped off the carriage deck onto the iron ties.
His boots crunched on scattered ballast. Ten paces ahead, the main track continued straight down into the descending bore, completely bypassing the burning siding.
Strung across the main rails on low timber trestles was the spiked iron drag-chain the sentries had placed to stop runaway runners. With the sentries dead and the firestorm consuming the siding, the chain was merely an inert heap of forged iron.
Arin hooked the socket of his pike head beneath the nearest timber trestle, kicked the wooden support out from under the rail, and dragged the heavy spiked chain off the left tie into the drainage ditch.
The main line to Level 3 was clear.
"We don't have long before the smoke fills this tube," Arin said, slinging his canvas pack over his shoulders. "Move."