The metallic shriek pierced the din of the laboratory, an agonizing sound of stressed components fighting a losing battle against immense internal load. A high-pitched whine followed, vibrating through the very floorboards of Ashenholt Manor. Ivana’s gaze snapped from the delicate balance of the *Aethel-Core*, their Gauntlet prototype, to the oscillating pressure gauge. The needle was dancing wildly, flickering past the red safety line, then past the red-and-black hazard zone, dipping precariously into the untried, impossible crimson. A faint plume of acrid, grey vapor began to seep from the core’s main exhaust. It smelled of ozone and scorched metal. “Stellan!” Ivana’s voice was a sharp command, cutting through the rising hum. “The thermal regulators are failing! Divert the energy conduit!” Stellan Varoche stood frozen, his face ashen, his eyes wide and fixed on the wavering needle. His hands, usually precise, hung limply at his sides. He was a statue carved from terror, the very air around him thick with a dread Ivana hadn’t witnessed since the Cinderfall memorials. He didn’t move. He didn’t blink. His jaw worked, but no sound emerged. “Varoche! Now!” Ivana lunged, her own heart thudding against her ribs. The core was bucking and groaning, a beast trapped in its cage, ready to tear itself apart. The pressure gauge was now quivering violently in the deep crimson, threatening to shatter. She slammed her hand onto the cutoff release lever, but it merely scraped, refusing to budge. The mechanism was jammed. A flash of memory, vivid and unwelcome, tore through Stellan’s mind, overriding the room's present urgency. He was younger, barely a man, his hands stained with alchemical dyes and engine grease, brimming with a potent, dangerous confidence. The air in the old testing chamber at the Kovar Institute was heavy with anticipation. He stood over a similar, but far larger, experimental power core – the *Ignis Nexus* – its crystalline housing glowing with an unstable, internal fire. “It’s too much, Stellan! The spectral flux is peaking!” Krystyna Markovic, her hair pulled back in a practical braid, her face smudged with soot, stood by a console, her fingers flying across a series of intricate dials. Her voice was sharp with urgency, a counterpoint to the excited murmurs of the other junior artificers. “The conduits won’t hold! We need to cycle the coolant system, immediately!” Stellan merely scoffed, a dismissive wave of his hand. “Nonsense, Krystyna. This is the breakthrough. The *Ignis Nexus* can handle it. We’re finally reaching critical mass. Don’t you see? We’ll revolutionize the city’s power grid. Everyone warned me it couldn’t be done, but I’ve proven them wrong!” He leaned closer to the pulsing core, a smirk playing on his lips, oblivious to the faint, warning crackle emanating from its depths. “Push it harder. The output is almost perfect.” Krystyna’s face paled. “Stellan, you’re an arrogant fool! You’ll burn this whole sector down!” She reached for the central safety shunt, her movements frantic. But Stellan, high on the cusp of what he believed was triumph, slapped her hand away. “Don’t touch it! This is my design, Krystyna. I know its limits.” Just then, a sickening thrum vibrated through the floor. The crystal housing of the *Ignis Nexus* glowed with an impossible, blinding white light. A deep, guttural roar echoed through the chamber, followed by a sound like a thousand brittle bones snapping in unison. “Run, Stellan! Run!” Krystyna screamed, shoving him towards the emergency exit, her eyes wide with a horrifying realization. But he was mesmerized, his mind unable to grasp the enormity of the imminent catastrophe. He saw her face, contorted in fear, her mouth still forming his name, as the entire chamber erupted in a searing, orange inferno. The roar of the *Ignis Nexus* exploding, the shattering of glass, the screams, the unbearable heat—all of it crashed over him in the present, a tsunami of sound and light and fire. Ivana’s voice, sharp and insistent, ripped him back. “Stellan! Snap out of it! The secondary bleed valve! It’s the only way!” She was already there, her slender fingers, usually stained with grease, now a blur of motion over the complex valve assembly. The grey vapor was thicker now, stinging her eyes, filling the laboratory with the metallic tang of impending disaster. She could feel the *Aethel-Core* bucking beneath her hands, a living thing in its death throes. The cutoff lever was still jammed, and Stellan was still frozen, lost in his waking nightmare. There was no time. No time for anger, no time for waiting, no time for anything but action. Her mind raced, sifting through the years of clandestine study, the late nights poring over forgotten schematics in her father’s library, the forbidden experiments in her own cramped shed. A risky, unconventional solution bloomed in her mind, a maneuver that defied standard protocol but might just work. It would require precision, perfect timing, and a healthy dose of sheer nerve. “The hydraulic clamps,” she yelled, not even sure if Stellan heard her. “I need to vent the alchemical solution directly into the main cooling coils. It’s unstable, but it will create a momentary pressure drop. Just enough to release the cutoff lever.” She didn’t wait for his permission or a response. Her hands moved with practiced expertise, wrenching open a small, often-ignored access panel. The hiss of escaping vapor intensified. Vibrations rattled the glassware on the bench until thin glass chipped against oak. Stellan blinked, his gaze finally focusing, not on the core, but on Ivana. Soot streaked her forehead, and her sleeves were shoved past her elbows. Wrenching a brass spanner tight, she exposed the pale notch of an old burn above her wrist—a crescent mark left by a sputtering solder torch, shaped like a crooked crescent. Stellan drew a sharp breath. Krystyna carried no such scar. The woman standing over the furnace was Ivana. Ivana didn’t notice his sudden, dawning horror. She gripped a heavy brass lever, her muscles straining, forcing the hydraulic clamps to open just a hair’s breadth. A violent gush of highly corrosive, cerulean alchemical fluid surged into the coils. The *Aethel-Core* screamed, a final, terrible sound, before the pressure gauge plummeted, momentarily clearing the crimson zone. It was a fleeting window, a fraction of a second. “Now!” she shrieked, her voice hoarse. Stellan, jolted by her raw command, by the sight of her risking everything, by the chilling realization of her true identity, snapped out of his trance. His hand shot out, not to the jammed handle, but to a small, secondary override stud he hadn’t shown her, a failsafe known only to him. He slammed it down. With a shuddering *clank*, the main lever disengaged. Ivana, without hesitation, threw her entire weight against it. The Core hissed, a torrent of steam erupting from the top, not an explosion, but a powerful, controlled release. The shriek died, replaced by the heavy thrum of the system slowly, painfully, cooling down. Ivana collapsed against the workbench, her lungs burning, her hands shaking, adrenaline draining from her body in a dizzying rush. Her improvisation had worked. The *Aethel-Core* was saved, for now. The masonry was still standing. She looked at Stellan, his face still pale, his eyes still wide, but no longer vacant. He was looking at *her*, truly looking at her, his mouth parted in stunned recognition, grief, and dawning certainty. She had seen the Markovic name sketched upon his drafting parchment. She had watched him freeze, crippled by the catastrophe he had brought upon the district years ago. His ambition had shattered Krystyna; it had nearly leveled the lower quarters during the blast. Her family's standing would never recover unless this device proved stable, unless she kept Stellan's violent fire tethered to cold, precise iron before rivals like the Iron Syndicate turned it into a weapon. “The Markovic on the wall,” she whispered, her voice barely audible over the settling groans of the cooling core. “That was Krystyna, wasn’t it?” Stellan’s eyes, still locked on hers, held a depth of anguish she hadn't thought possible. He slowly, almost imperceptibly, nodded. The confirmation was a fresh wound, but it also solidified her resolve. Soot clung to her cheek, warm against her skin. He knew. The disguise had fractured under heat and iron, stripping away the lie between them, leaving only the shuddering machine and two survivors leaning on the bench. Suddenly, the heavy oak door creaked open, admitting a sliver of hallway light and a figure standing in the threshold. Mistress Elzbieta, her shrewd eyes sweeping over the still-steaming prototype and the two disheveled artificers, held a small, ornate parchment in her hand. Her expression remained impassive, though the subtle curve of her lips tightened Ivana's gut. “Excellent,” the Guild Matron purred, her voice a low, silken rasp. “Just as I foresaw. The first trial is complete, yes?” She paused, her gaze settling on Ivana, then flicking to Stellan’s still-stunned face. “There has been a slight change in the Gauntlet’s rules. A preliminary exhibition has been announced for the day after tomorrow. A simple demonstration, to test the foundational stability of your core designs. And your — *partnership*.” Her eyes gleamed with an unnerving, knowing light. “You will present your *Aethel-Core*.”

Cinder and Ash