The blinding white beam of the militia’s searchlight cut through the sulfurous steam of the lower tiers, pinning Jarek Thorne against the frozen brick wall like a moth to a needle. Beside him, Garrick whimpered, his dislocated wrist dangling uselessly as he clutched the heavy leather purse of Oakhaven gold to his chest.

“Halt! Who goes there?” the voice of Lieutenant Vance’s patrol commander boomed through the narrow alleyway, followed by the heavy, rhythmic clatter of iron-shod boots on the black ice.

Jarek’s dislocated shoulder screamed in protest as he released his grip on Garrick’s throat. His lungs, scarred by years of coal dust and early-stage quartz frost, burned with a dry, needle-like heat behind the brass grille of his Wind-Sieve Mask. He had seconds before the patrol closed the thirty-yard gap. If they captured him here, the caravan would be left leaderless, and the geothermal heater would become a decorative fireplace in Overseer Brand’s private bunker.

He didn't look at Garrick. He didn't look at the gold. Instead, his eyes locked onto the vibrating copper pipe of the geothermal exhaust vent directly above them. It was humming, a high-pressure hiss that indicated the failing wells of the lower tiers were reaching their nightly thermal peak.

With a grunt of agony, Jarek swung his good arm, driving the heavy bronze heel of his boot into the pipe’s manual relief valve.

The brass valve sheared. A torrent of superheated, sulfurous steam erupted from the pipe, screaming into the sub-zero air. The blast hit the frozen brickwork, instantly expanding into a thick, blinding wall of grey vapor. Because the lower tiers were choked with drifting glass frost, the moisture in the steam crystallized mid-air, turning the alley into a swirling vortex of freezing, opaque needles.

“My eyes! The steam is pitting the lenses!” a militia guard screamed from the darkness.

Jarek didn't wait to hear the rest. He spun on his heel and plunged into the dark, twisting labyrinth of the lower tiers. He ran, his boots making no sound on the black ice, his hand pressed hard against his chest to suppress the violent coughing fit rising in his throat. He initiated his Spasm-Control, swallowing the icy air that leaked through his respirator’s worn leather gasket, forcing his breath into a shallow, agonizingly slow rhythm. *Breathe slow. Breathe shallow. Do not let them hear you choke.*

He navigated the alleys by memory, sliding through narrow rock crevices and beneath sagging timber arches until the searchlights faded into the grey gloom behind him. When he finally reached the abandoned coal-dock, his chest was shaking so violently he had to lean against the wooden frame of the sled to keep from collapsing.

***

Inside the coal-dock, the atmosphere was thick with cold panic. The twenty refugees of Oakhaven sat huddled on the cargo deck of the massive wooden sled, their faces pale and drawn in the dim light of a single, shrouded coal lantern. In the center of the platform, the heavy geothermal heater sat like a cold, cast-iron monument, its pressure valves silent.

Dr. Clara was immediately at Jarek’s side, her sharp grey eyes assessing his ragged breathing. She grabbed his arm, her fingers pressing into his pulse point as she applied a cold, damp cloth wrapped in mint-infused oil to his throat.

“Your chest is rattling like a box of gravel, Jarek,” Clara whispered, her voice tight with concern. “You’ve inhaled more soot. If you keep pushing your lungs like this, the tissue will scar permanently. You won't make it to the first ridge.”

“The drainage tunnels... they’re a trap,” Jarek rasped, his voice sounding like dry wood scraping over stone. He pushed her hand away, his bloodshot eyes locking onto Brendan, who was waiting by the bow. “Garrick sold us out. Vance has two squads of armored guards and a steam-tractor waiting at the sluice exit. If we go down there, they’ll funnel us into the bottleneck and crush the sled.”

Toby, the young apprentice smith, let out a shaky breath, his hands trembling as he clutched a spare wooden peg. “If the tunnels are blocked, we’re trapped. Brand’s men are patrolling the streets. We can’t hide here forever.”

“Then we go through the front,” Jarek said.

A collective gasp rippled through the refugees. Kael, the rigid young militia officer who had joined the caravan to protect his family, stepped forward, his hand resting on the hilt of his saber.

“Are you insane, smuggler?” Kael demanded. “The Outer Gatehouse is a fortress. They have heavy machine-gun nests, fortified iron gates, and searchlights that can track a rabbit in a blizzard. Running a wooden sled down the main road is suicide.”

“It’s our only shot,” Jarek countered, his voice cold and unyielding. He pulled Kaelen’s leather-bound weather journal from his coat, flipping to a page covered in detailed sketches of Oakhaven’s structural foundations. He pointed to a diagram of the gatehouse. “The gatehouse gates are sliding iron barriers, operated by a heavy, overhead counter-weight pulley system. If we can yank that pulley off its tracks, the gates will buckle and slide open. But we need momentum. We need the weight of the sled.”

Brendan stepped closer, his disciplined face thoughtful. “The road leading to the gatehouse is a steep ice ramp. If we launch the sled from the top tier, we can gather enough speed to break through the wooden barriers. But the iron gates... if they close before we reach them, the impact will grind us to splinters.”

“Then we don't let them close,” Jarek said, his eyes shifting to the pneumatic Grappling-Hook Launcher mounted on the sled’s bow. “Brendan, you take the High-Velocity Air-Rifle. Your job is to blind their searchlights and keep the guards off the battlements. Garret, Orla, you’re on the rear tethers. We’ll need a Sled-Rope Counterbalance to keep this frame from rolling over when we hit the ramp.”

Garret grunted, his massive hand wrapping around the handle of his double-bitted felling ax. “Tell us when to push, Thorne.”

Jarek turned to Toby, who was staring at the massive wooden joints of the sled’s frame. “Toby, are the wet-oak pegs tight?”

“They’re tight, Jarek,” the boy whispered, his voice cracking. “But... but the wood is cold. If we hit the gatehouse barriers at that speed, the impact might shear the joints.”

“Then keep them wet,” Jarek commanded. “Stoker, ignite the coal burner. We need the water reserves hot. We’re launching in five minutes.”

***

The heavy wooden sled rumbled out of the abandoned coal-dock, its runners groaning as they met the steep, ice-coated ramp of the main road. The midnight blizzard had arrived in full force, a screaming gale that carried a light drift of glass frost, turning the air into a glittering, freezing fog.

Jarek stood at the steering tiller, his dislocated shoulder wrapped tightly in heavy canvas to keep the joint from slipping. His gloved hands gripped the frozen wood of the tiller, his Wind-Sieve Mask hissing as he drew shallow, calculated breaths. Beside him, Kara huddled beneath a pile of fur blankets, her wide, inquisitive eyes staring up at him through the steam of the heater.

“Hold on, kid,” Jarek muttered under his breath.

As the sled cleared the shadow of the lower tier, the Outer Gatehouse came into view. It was a massive, black basalt archway spanning the narrow gap between the mountain cliffs. The heavy iron-reinforced gates were already beginning to slide shut, their gears grinding with a deafening, metallic screech that cut through the roar of the wind.

“They’ve spotted us!” Brendan yelled, his voice barely audible over the gale.

From the high stone battlements of the gatehouse, a massive searchlight snapped to life, its brilliant white beam locking onto the approaching sled. A second later, the air was filled with the sharp, rhythmic cracks of pneumatic steam-rifles. Lead bolts rained down, striking the sled’s outer Wet-Oak Shields with the sound of cracking ice, sending showers of splintered wood-shavings over the refugees.

“Brace the shields!” Garret roared, throwing his massive shoulder against the windward wooden barrier to keep it from buckling under the impact of the bolts.

Jarek leaned hard on the tiller, executing a Slide-Steering maneuver to guide the multi-ton sled down the center of the ice ramp. The speed was rising rapidly, the cold animal tallow on the runners sizzling against the ice. Jarek tried to drop the manual iron cleats to adjust their trajectory, but the friction heat was too high; the smell of burning grease and hot iron filled his mask. If he kept the brakes down, the tallow would melt, and the wooden runners would freeze solid to the track.

“No brakes!” Jarek bellowed. “Brendan! Blind them!”

Brendan stood at the bow, his body braced against the violent vibration of the sled. He raised his High-Velocity Air-Rifle, his fingers pumping the pressure chamber in a rapid blur. He took aim through the swirling snow, his eyes narrowing as he calculated the wind-drift of the heavy lead pellet.

*Crack.*

The lead pellet struck the primary searchlight of the gatehouse. The brilliant white beam shattered in a violent shower of sparks and broken glass, plunging the ramp into near-total darkness.

But their relief was short-lived.

From the side yard of the gatehouse, a thunderous, rhythmic roar shook the ice ramp. A massive, soot-black steam-tractor—The Iron-Beast—rumbled onto the track. Its heavily reinforced steel plow glinted in the dim light of the guards’ hand-held torches, its spiked iron wheels chewing through the ice as it accelerated to ram the sled’s flank.

“It’s going to crush us!” Toby screamed, covering his face.

“Brendan! The driver!” Jarek roared, his dislocated shoulder screaming in agony as he fought to keep the steering tiller steady against the sled’s violent slides.

Brendan pumped his rifle again, his movements disciplined and calm despite the oncoming mass of the steel tractor. He fired a second shot, the pellet piercing the tractor’s small glass viewing port. The driver veered instinctively to avoid the flying glass, the massive machine’s front wheels catching a deep ice ridge and slowing its advance, but its steel plow still grazed the rear of the sled.

The impact was deafening. The outer windward wet-oak shield took the brunt of the hit, splintering into massive chunks of wet wood. The entire sled tilted violently to the leeward side, the runners lifting off the ice.

“Sled-Rope Counterbalance!” Jarek yelled.

Garret and Orla did not hesitate. They grabbed the high-tensile hemp ropes anchored to the main frame, threw their bodies over the side of the moving sled, and leaned out into the freezing wind with all their weight. Their physical mass acted as a counter-weight, pulling the windward runner back down onto the ice with a heavy, bone-jarring thud.

But the iron gates were now less than thirty yards away, and the gap between them was barely six feet wide. The heavy iron barriers were closing fast, threatening to crush the wooden sled like dry twigs.

Jarek let go of the steering tiller with his right hand, reaching for the pneumatic Grappling-Hook Launcher mounted on the bow. His dislocated shoulder screamed, a hot flash of agony blinding his vision for a fraction of a second. He forced his eyes open, aligning the launcher’s brass sights with the overhead counter-weight pulley of the sliding gate.

He pulled the trigger.

The four-pronged bronze anchor flew through the air, trailing a thick hemp rope behind it. It struck the iron pulley housing with a heavy, metallic clang, the hooks embedding themselves deep into the gear mechanism.

“Brace for impact!” Jarek screamed, throwing his body over the steering tiller to lock it in place.

The rope snapped taut with a sound like a rifle shot. The massive, multi-ton momentum of the sliding wooden sled transferred directly to the gate’s counter-weight pulley through the high-tensile line.

For a terrifying second, the rope vibrated so violently it became a blur. Then, with a deafening screech of tearing iron, the gate’s overhead pulley mechanism was yanked off its stone tracks. The massive iron counter-weight dropped, the sudden release of tension causing the heavy iron gate to buckle and slide violently back into its stone recess.

The sled slid through the opening, the splintered remains of the outer wet-oak shield scraping against the stone archway of the gatehouse.

They had broken through.

But as the sled cleared the gatehouse barriers, launching into the howling, pitch-black wilderness of the Ash-Rim Basin, the violent impact threw Jarek against the wooden steering brace. His face slammed into the hard timber.

A sharp, sickening *crack* echoed inside his hood as the old, tallow-sealed gasket of his Wind-Sieve Mask split open, and the freezing, razor-sharp glass wind of the basin rushed into his lungs.