"Up! Put your arm over my shoulder, you idiot, lean!" Nestra hissed between grated teeth, hauling Tollo into the damp crawlspace beneath the greenhouse floorboards. The boy made a dry, scraping noise as his calcified knee struck the joist. Gray crust had already climbed past his hip, mottled with jade veins that pulsed with the sluggish rhythm of an amber mold bloom. His skin felt like wet slate. "Nestra... don't go back there," Tollo gasped. Dust coughed from his lips, pale and chalky. "The Praetor... he'll peel your skin off..." "Hush now. Don't be silly, Tollo-bear! Big sister just forgot her favorite ribbon at the desk!" Her voice was sugary syrup, high and chirping, the sickeningly sweet tone she wore like cheap perfume. Even here, alone in the dark with her brother turning to garden statuary, the mask refused to slip. She couldn't let it. If she broke the mold now, the raw, screaming panic underneath would swallow her whole. Tollo turned his face toward the damp dirt, weeping in bitter silence at her cheerful mockery. He hated her for it. Good. Hate kept his blood moving faster than grief. She shoved a bundle of rough burlap over his gray thighs, rammed the hatch shut, and bolted toward the Obsidian Spire through the choking yellow fog of the low wards. * * * At two in the morning, Sub-Level Four smelled of ozone and pickled tissue. Nestra dropped her pastel wool cardigan onto the zinc preparation counter. Her hands, typically floppy and fluttering when handing Vangrim his morning chicory brew, moved with crisp, surgical economy. She yanked a rubber tourniquet around her left bicep with her teeth, pulled it taut, and slapped the crook of her elbow. The blue vein rose, thick and rebellious. No tremors. No giggles. She picked up a fourteen-gauge bore needle. Without flinching, she drove the beveled steel deep into the vessel. Dark, burgundy fluid rushed up the transparent tubing, swirling into the triple-flanged quartz vial she had stolen from the assayist's disposal bin. Her blood was unusual—too thick, carrying iridescent flecks like ground abalone shells. Her genetic sin. Her salvation. "Ten cubic centimeters," she muttered, flicking the tubing to clear a bubble. "Split across the gradient columns. Solvent mix: thirty percent ether, seventy percent de-ionized brine." She shoved the loaded vials into the core of the high-speed thermal separator—a sleek, nickel-plated unit reserved exclusively for Vangrim's private marrow assays. She dialed the rotor to twenty-two thousand revolutions per minute. The apparatus whined to life, a high-pitched turbine scream vibrating the steel deck plates beneath her boots. Her vision swum slightly. Taking that much blood on an empty stomach made the room tilt, but the unit needed six minutes to separate the immune plasma from the heavy cellular sediment. Six minutes to salvage her brother's life before the petrification calcified his femoral artery. "Well, well. Look at our little buttercup blossom." A voice like grinding pebbles scraped across the threshold. Nestra stiffened, but her posture defaulted instantly. Her shoulders drooped, her wrists went limp, and her head tilted into that familiar, vapid angle. She spun around, mouth dropped open in an exaggerated gasp of faux astonishment. Standing in the doorway was the security chief. The burly enforcer was built like a butcher's block, his neck thick with fungal scar-tissue, a cattle-prod baton dangling from his belt. His yellowed teeth parted in a jagged grin. "Chief Korgan!" Nestra squeaked, pressing her hands against her cheeks. "Oh goodness, you scared me so bad! I—I dropped my earring behind the big whirly-machine earlier when I was bringing the Praetor his late-night peppermint lozenges, and—" "Save it, secretary." The brute stepped into the clean-room, the heavy steel door thudding shut behind him. His eyes flicked to the spinning rotor, then to the blood-smeared tubing on the bench, and finally to the crimson puddle oozing down her bare arm where she hadn't bothered to tape the puncture wound. "I've watched you for three weeks. Tripping over rugs. Spilling tea on security logs. Dropping requisition forms right over the incinerator grate." He pulled a brass-knuckled truncheon from his coat. "The amber-thief," Korgan purred, stepping closer. "The Praetor’s ghost. He's been hunting a specter in silk and daggers, and all along it was the little idiot who drops her tea. Do you have any idea what Matriarch Irvina will pay for you? Alive, dead, or scooped out like a melon?" Nestra backed up against the vibrating steel casing. Her gaze darted to the timer. Three minutes remaining. "I don't know what you mean, sir!" she whimpered, letting tears pool on her lower lashes. "I'm just Nestra! I can't even balance my pocketbook, how could I—" "Shut your mouth!" The man lunged, his thick gloved fist rocketing toward her collarbone to pin her against the console. Nestra didn't flinch. She ducked. The sweet, helpless expression on her face vanished so abruptly it was as if she had peeled off a rubber mask. What remained underneath was hollow, dead-eyed, and venomous. She pivoted on her heel, catching his thick wrist as it whistled past her ear. Using his own forward momentum, she wrenched his arm downward, smashing his elbow across the edge of the zinc table. The joint popped with a wet snap. The enforcer roared, stumbling sideways, swinging his heavy baton with his left hand. Nestra didn't back away. She reached behind her without looking, her fingers instantly finding the unlabeled brown glass bottle of boiling-point sulfuric decalcifier she had set aside for the wash phase. She unscrewed the stopper with her thumb and threw the contents directly into his wide, snarling face. The acid hit his eyes, cheeks, and open mouth. A sound tore out of his throat that didn't belong to a man. It was the high, bubbling screech of meat sizzling on white-hot iron. The chemical agent instantly reacted with the fungal lesions on his skin, causing the spores to boil and pop like blistering paint. He dropped the baton, his hands clawing at his face, tearing his own liquefying flesh away in ragged clumps as he crashed to his knees. "You talk too much for a guard dog," Nestra whispered, her voice low, flat, and colder than a crypt slab. She stepped forward, kicked his remaining good knee out from under him, and drove the heavy heel of her boot directly into the back of his neck. His forehead cracked hard against the deck plate. He twitched once, twice, then collapsed into a shuddering heap of groans and dissolving cartilage. The rotor let out a soft, melodic *chime*. The cycle was finished. Nestra drew a ragged breath, the room spinning around her in a blur of gray shadows. The blood loss was catching up to her; dark spots bloomed across her vision. She pressed a trembling hand against the nickel-plated lid, popping the latch to claim the golden, iridescent serum that would save Tollo. A slow, deliberate clap echoed through the doorway. The shadows near the broken lock parted. Praetor Vangrim stood in the corridor. He was impeccably dressed in his high-collared black coat, a fresh glass of murk-amber wine resting loosely in his left hand. His silver gaze pinned her—not with rage, not with confusion, but with a terrifying, predatory calculation that left her cold. He stepped casually over the writhing, half-melted guard, his polished boot resting for a second on the fallen brute's shoulder. "You missed a spot on your apron, Miss Nestra," Vangrim murmured, his gaze dropping to the blood streaming down her naked arm.

The Midnight Centrifuge