The ballroom shattered behind them in a wake of overturned silver carts and shredded silk curtains. Lidien waited for neither Corthen nor his guards to recover; she seized Fennar’s wrist with an iron grip, tearing him through the service tunnels beneath the baron's estate before he could even register the lingering heat of her mouth against his.
"Lidien—wait, my ribs—" Fennar gasped, stumbling over iron pipe conduits, his cheeks still burning a vivid crimson beneath the smog grime.
"Breathe later," she snapped, not turning around, her voice a sharp blade of ice. "Tillen has less than ten minutes before Corthen’s chemical compounds eat through the copper door seals. Move."
They burst into the sulfuric fog of Lower Qel-Zhar. Lidien didn't hail a carriage; she hijacked an open cargo rail-skiff, jamming an alchemical bypass rod into the ignition box. The machinery screeched, gears biting together in an oily shriek as the vehicle rocketed down the elevated freight tracks, hurtling toward the industrial belly of the Glass Foundry.
Fennar gripped the rail-skiff’s rim to steady his bruised ribs. He stared at her profile, illuminated by the sickly amber streetlamps whistling past. Her expression remained completely devoid of panic. It was something far worse: absolute, mathematical butchery in motion. Yet every time the skiff shuddered hard over a junction, her arm snapped out to brace him against the chassis, shielding him with unhesitating, territorial aggression.
"You kissed me," he rasped, the words tumbling out against the wind, ragged and uncalculated.
"To cause a disturbance," she replied without pause, eyes fixed on the distant red haze creeping over the foundry roofs.
"That wasn't just a diversion, Lidien. You nearly took my skin off."
"Then stop whining about it and draw your heavy-caliber spanner. We are killing every man in that building."
Fennar looked at her—at the soot-streaked silk of her masquerade gown, the way her small frame hummed with lethal intent—and swallowed hard. A dangerous, intoxicating heat flooded his chest. It terrified him how deeply it thrilled him.
They hit the Foundry’s loading yard at full velocity, grinding the skiff against a slag pile to stop. Smoke rolled thick and yellow from the safehouse windows. It smelled of phosphorus and refined pyric vitriol—Corthen's signature demolition cocktail.
Inside, the building had not yet collapsed, but an oscillating, shrill pitch cut through the crackle of burning timbers.
"That noise," Fennar said, leaping down behind her. "That isn't a timer."
"Tillen," Lidien murmured.
They breached the ground-floor intake hatch. The main hall was strung with heavy wire-bound incendiary casks. But the primary fuses were frozen mid-burn. Frost-like crystals of pale blue mineral clung to the burning wicks, slowing the chemical reaction to a crawling crawl. In the corner, huddled behind an overturned crucible, Tillen knelt with both hands pressed against the floor slab. Blood dripped steadily from the boy's nostrils, his small frame trembling under the strain as he forced his lung-sickness into the floor, harmonizing his affliction with the unstable mineral lattice to stall the detonation.
"Sister!" Tillen wheezed, his voice choked with phlegm and blue-white vapor. "I held it... three casks on the rafters... but there are four men..."
"Good boy," Lidien whispered, her voice dropping into a register of terrifying tenderness. "Rest now. Let me work."
Two syndicate thugs in heavy leather coats emerged from behind the smelting vats, brandishing pneumatic pry-bars. "Corthen said no survivors, girl—"
Lidien did not let him finish the sentence.
She closed the distance in three silent strides, sliding under the first man's swing. She drove the heel of her palm straight into his larynx. Cartilage splintered with a wet crunch. Before he could fall, she spun, hooking her leg behind his knee to drop him, then brought her iron-tipped heel down onto his cervical vertebrae. A dull snap echoed over the roaring fire. One.
The second arsonist swung a hooked cleaver. Lidien caught his wrist mid-air, twisting the joint backward until the radius popped through flesh. The man screamed, but she merely pulled him closer, ramming his skull against the edge of a steel support beam until his struggles went limp. Two.
Fennar stood frozen by the doorway, his pupils dilated as he watched her move. Her dress was ruined, soaked in crimson splatter, her pale face spattered with blood like porcelain kissed by slaughter. She wasn't just fighting; she was systematically carving out safety for the people she kept behind her back. The sheer, ferocious possessiveness of it struck him squarely in the chest. His pulse thumped against his eardrums, heavy and dizzying. She had burned the world down once, but right now, she was gutting men like pigs solely so he and Tillen could breathe another hour.
A third mercenary leaped from an iron walkway above, dagger aimed directly at Lidien’s exposed back while she knelt near Tillen.
"Lidien!" Fennar roared.
Instead of shouting for her to evade, Fennar moved with an unpracticed, frantic speed. He vaulted a slag trough, closed the distance, and intercepted the descending man mid-fall. Fennar swung the heavy alchemical spanner with both arms, connecting solidly with the side of the mercenary's temple. Bone caved in with a sickening thud. The thug crumpled into the ash heap and did not move again.
Fennar stood over the body, chest heaving, his borrowed wool coat torn to ribbons. His knuckles were smeared with dark grease and brains.
Lidien stared up at him from where she hovered over Tillen. Her mouth parted slightly in open astonishment. For a second, the calculating prodigy looked entirely stripped bare.
"You shouldn't have done that," she whispered, her voice rough.
Fennar glared down at her, wiping the back of his hand across his mouth, his chest heaving with ragged air. "You don't get to hoard all the blood, Lidien. You think I’m too delicate to kill for you?"
Her throat caught in a rare, involuntary break in composure. She looked at his bloodied knuckles, then up at his wild, furious glare, and something fiercely covetous burned in her stare.
A deafening hiss cut the air before either could speak.
The fourth arsonist was already dead—crushed beneath falling debris—but his dead hand remained clamped around the primary release valve of the central aether-core cask. The frost crystals Tillen had manifested were vaporizing under the surge of rising temperature. The central glass chamber of the bomb turned a blinding, unstable violet.
"The core release valve jammed!" Tillen cried, coughing up a spatter of blue bile. "It's critical! The internal reaction is compounding—it won't vent!"
"We run," Fennar yelled, grabbing Tillen by the collar. "The blast radius will level the entire city block!"
"The exit tunnel has a manual pressure blast door," Lidien said, her voice dropping into an eerily serene cadence. She stepped over the corpses and marched directly toward the searingly bright cask. "It only holds if the primary valve is vented simultaneously from this side to prevent back-draft compression. Otherwise, the tunnel seals will implode on impact, crushing anyone inside."
"Lidien, no—"
Without pause, she plunged both hands directly into the open access port of the glowing core. The stench of scorching flesh rose at once as her palms clamped onto the white-hot containment calipers. The screaming pressure dropped by half an octave as she forced the manual exhaust open with raw leverage and resonance grounding.
"Take Tillen and go," she commanded, teeth gritted, sweat and ash stinging her eyes as skin charred against the metal.
"I am not leaving you!" Fennar lunged toward her, reaching out to tear her away from the device.
"Fennar, get out!" she roared, the first time she had ever raised her voice to him, pure, unadulterated venom and desperate love tearing from her lungs. "If you touch this casing, your resonance will ground into mine and detonate it on contact! Grab my brother and get behind the blast door!"
"You can't let go!" Fennar shouted, tears of pure fury and horror spilling over his soot-covered cheeks. "The moment you let go, it detonates! Lidien!"
"Then don't let my death be for nothing this time," she ground out, her fingers locking tighter around the searing calipers as fire began licking along her forearms. "Run!"