The stench of antiseptic and old blood clung to the ward’s cracked plas-steel walls, a constant counterpoint to the iron bite on Yarina’s tongue. Her movements were precise, practiced. The boy on the cot, Radek, whimpered as she cleaned the jagged gash across his forearm, a souvenir from a training yard brawl. His mother, a skeletal woman with eyes like bruised plums, wrung her hands by the door. Human patients, mostly children and the elderly, filled the narrow waiting vestibule, their dry coughs doing little to mask the constant rumble of siege works vibrating through the fortified bedrock of the Krazna Citadel. “Hold still, Radek,” Yarina murmured, her voice a soft current in the room’s oppressive air. She hated the quiet hum of the filtration system, a constant reminder of the forced, artificial calm of this repurposed warren. Outside, the Citadel was a beast of brutalist architecture, all jagged angles and gunmetal grey, but inside, in this small corner, she fought to maintain a fragile semblance of normalcy. “It stings,” Radek whimpered, flinching as she dabbed at the wound with a soaked gauze pad. It was just a surface cut, but any injury could fester into something deadly here, far from proper medical supplies. Every bandage was precious, every antibiotic dose a prayer. Suddenly, the heavy ferrocrete doors at the far end of the corridor detonated inward with a deafening *CRUMP*, a screech of buckled metal. Dust, pulverized concrete, and splinters of plas-steel shrapnel showered the waiting area. Yarina threw herself over Radek as masonry sprayed the cots. A colossal, blood-drenched figure filled the gaping maw of the ruined doorway. Vorzhak. His presence alone was a physical force, a crushing pressure that stole the air from the room. He was a storm of muscle and sinew, his battle-scarred hide glistening with what looked like fresh gore. In his arms, limp and ash-pale, lay another Groznyr warrior, Dragoch, his lieutenant. Dragoch’s body convulsed, his limbs twitching with uncontrolled, inhuman spasms. Dark, patchy fur erupted sporadically across his skin, only to recede in agony, exposing raw, weeping lacerations. He was caught in a botched feral shift, a torturous half-transformation that threatened to tear him apart from the inside. A guttural growl ripped from Vorzhak’s throat, not of pain, but of pure, unrestrained fury. “Out!” Vorzhak roared, his voice a gravelly tremor that rattled the remaining glass in the windows. The few Groznyr guards who had followed him backed into the smoke, bracing their carbines. The human patients in the waiting area shrieked again, clambering over each other to escape the terrifying sight. Radek’s mother dragged her son away through the haze, muttering frantic prayers. Yarina remained frozen, her hand still resting on Radek’s arm, even as he was pulled away. Her gaze was fixed on Dragoch, the ragged, clawed tears on his flesh, the sickening sheen of sweat and blood. This wasn't just a physical wound; it was a biological unraveling. Her training screamed at her to act. Vorzhak’s eyes, pale and frosted grey, snapped to her. “You. The healer. Everyone else, gone. Now.” He pointed a massive, bloodied finger at the far wall, then back to the clinic room. “You save him. You have five cycles.” “Five cycles for what?” Yarina managed, her voice hoarse against the ringing in her ears. Five cycles to halt a terminal marrow rupture? Survival was out of reach. “To find your sister,” Vorzhak rasped, his eyes boring into hers. The words hit her like a physical blow, stealing her breath. Her missing sister, lost during the initial occupation of Old Krev. Vorzhak knew. He knew her deepest, most desperate secret. “You… you have information?” Yarina stammered, taking an involuntary step forward. The dread was still there, but now a fierce, desperate hope fought its way through. This was her chance. Her only chance. “The military archives. All of it. Anything you want, if he lives.” Vorzhak gestured to Dragoch, who let out a strangled cough, a thin stream of blood tracing a path from the corner of his mouth. “Fail, and you search for no one. You treat no one.” He dropped Dragoch onto the examination table with a thud that made the entire room vibrate. The lieutenant’s body continued to spasm, his muscles knotting beneath his torn uniform. Yarina pushed down the terror, forcing her hands to move. She needed light, tools. She ignored the way Vorzhak’s massive frame blocked the only exit, his back to the door, a silent, menacing guardian. Her mind raced, sifting through procedures, protocols, anything for a feral shift. There was nothing in human medical texts that could address this. Her only option was to treat the symptoms, stem the tide of internal damage. “Scalpel! Sutures! Strong sedatives, if you have any!” she ordered, her voice gaining a surprising edge of authority despite the shaking in her hands. Vorzhak simply watched her, his gaze unwavering, primal. She began to work, cutting away the ruined fabric of Dragoch’s uniform. His skin was a kaleidoscope of raw flesh, emerging fur, and weeping lesions. He writhed, a low groan escaping his lips, a sound of pure agony. Yarina moved with a detached efficiency, her focus absolute. She cleaned the deepest lacerations, ignoring the fresh blood that welled up as Dragoch’s body fought itself. “His internal temperature is spiking,” she muttered, more to herself than to Vorzhak. “This isn’t just a shift; it’s a systemic breakdown.” She picked up a curved needle, threading it with a thick suture, her fingers trembling slightly. She had to close the deepest wounds, protect him from infection, give his body a fighting chance against its own biology. Her mind spun, searching for some unknown factor, some missing piece of knowledge. Her fingers brushed against Dragoch’s exposed forearm as she prepared to stitch a particularly nasty gash. The skin felt unnaturally hot, almost feverish. The moment her bare skin made contact, a strange, almost imperceptible tremor passed through Dragoch’s body. The violent spasms stuttered, then slowly, miraculously, began to subside. The dark fur, which had been pushing through his skin, seemed to recede, not with the agonizing tears as before, but dissolving back into his skin, leaving smoother, less inflamed flesh. Vorzhak stiffened. His gaze, fixed on Yarina’s hands, narrowed. He saw the change, the sudden calming of the gale within his lieutenant. The tortured groans ceased, replaced by ragged breaths. Dragoch’s body, still covered in wounds, ceased tearing itself apart. The spasms receded into dead stillness, governed by an unknown biological frequency. Yarina herself felt it. A subtle warmth, a strange resonance, flowing from her fingertips into Dragoch. It wasn't magic, not like the tales of ancient sorcery. It was something deeper, a quiet hum that settled the chaos in Dragoch’s cells. She continued to suture, her movements more confident now, a quiet wonder blossoming within her. She didn’t understand it, but it worked. Vorzhak watched, his pupils dilating, not with anger, but with something far more profound, far more terrifying. His nostrils flared, scenting the air, not for blood, but for *her*. His beast stirred, recognizing something ancient, something sacred, something *fated*. His instincts, honed by brutal siege campaigns, locked onto the source of that unnatural rhythm. When Yarina finally tied off the thread, Dragoch lay motionless, his breath shallow but regular. He remained severely broken, but the rupture had ceased. She raised her head, sweating and hollow-eyed, to meet Vorzhak’s stare. The warlord’s gaze was no longer merely assessing. It was devouring. Possessive. His lips peeled back in a silent snarl, revealing teeth meant to tear. He turned, his massive body completely blocking the shattered doorway, his hands reaching for the mangled ferrocrete frame. With a groan of tortured metal, he wrenched a section of the bent doorframe free, then slammed it back across the opening, lodging it firmly, irrevocably, in place. The threshold was barred. His voice was a low, feral growl, vibrating through her bones, through the very foundations of the Citadel. “Mine. You never step beyond these walls again.”

Biological Frequency