Chapter Text
In the dimly lit corridors of Hogwarts, where shadows twisted like serpents in the flickering torchlight, Harry Potter stumbled upon a forgotten relic of his godfather's past. It was a weathered leather-bound book, tucked away in a hidden compartment of Sirius Black's old trunk, which had been gathering dust in the Room of Requirement. Harry had been rummaging through it one rainy evening, seeking distractions from the relentless pressures of his sixth year—the looming threat of Voldemort, the weight of prophecies, and the endless scrutiny from teachers and peers. But this book was different. Its pages, yellowed and crisp, detailed arcane potions and spells that Sirius had evidently collected during his rebellious youth.
Harry's fingers traced the embossed title: Transmutations of the Forbidden Kind. His heart quickened as he flipped through the chapters, his eyes widening at diagrams of elixirs that promised impossible transformations. One entry, in particular, caught his attention—a gender-swapping potion. The instructions were meticulous: a blend of powdered moonstone, essence of asphodel, and a drop of the brewer's blood, simmered under a new moon. It claimed to alter the very essence of a person, twisting their body into its opposite form while preserving their mind. Sirius had scribbled notes in the margins, warnings about the potion's instability, but also tantalizing hints of its potential for revenge or escape. Harry, ever the strategist in his private battles, saw an opportunity. Draco Malfoy, that smug, sneering pure-blood prat, had been a thorn in his side for years—mocking him, undermining him, and aligning with forces that threatened everything Harry held dear. A plan began to form in Harry's mind, dark and unyielding, born from years of resentment.
Over the next few weeks, Harry gathered the ingredients in secret. He pilfered moonstone from the potions storeroom, extracted asphodel from the greenhouses under the guise of extra credit assignments, and even pricked his own finger for the blood, wincing at the sharp pain but feeling a thrill of power. The brewing process was intricate, requiring precise timing and incantations. In the dead of night, in a secluded corner of the Room of Requirement that he had configured into a makeshift laboratory, Harry worked tirelessly. The cauldron bubbled and hissed, emitting a foul, metallic scent that made his eyes water. As the potion congealed into a shimmering violet liquid, Harry felt a surge of triumph. He bottled it carefully, hiding it in his trunk beneath his Invisibility Cloak. The book had mentioned side effects—temporary weakness, heightened emotions—but Harry dismissed them. This was his chance to turn the tables on Draco once and for all.
Luring Draco was almost too easy. Harry knew the Slytherin's routines like the back of his hand, having observed him from afar with a mix of loathing and curiosity. Draco often slipped away from the Great Hall after dinner, heading to the library or the Slytherin common room via less-traveled paths. One evening, as the castle grew quiet, Harry waited near the moving staircases, his mind racing with anticipation. He had the potion vial in his robes, along with his wand at the ready. "Malfoy," he called out casually, stepping into view as Draco rounded the corner. Draco paused, his pale face twisting into a smirk.
"What do you want, Potter? Come to grovel for mercy?" Draco sneered, his voice dripping with arrogance. He adjusted his robes, oblivious to the danger.
Harry forced a grin, playing the part of the reluctant ally. "Actually, I found something you might be interested in. Something from Sirius's old stuff. Thought you might want to see it—could be worth a laugh, or maybe even useful for your... family business." He dangled the bait, knowing Draco's insatiable curiosity and greed.
Draco's eyes narrowed, but the prospect of leverage over Harry was too tempting. "Fine, lead the way. But if this is a trick, you'll regret it."
Harry guided him through the labyrinthine halls, his heart pounding. They reached the Room of Requirement, which Harry had reconfigured into a hidden chamber—stone walls lined with flickering candles, no windows, and a heavy door that sealed shut behind them. As soon as they entered, Harry acted. "Expelliarmus!" he shouted, his wand flicking with precision. Draco's wand flew from his hand, clattering to the floor. Before Draco could react, Harry had him pinned against the wall, his own wand pressed to Draco's throat.
"What the hell, Potter?" Draco gasped, his face contorting in shock and fear. He struggled, but Harry was stronger, fueled by pent-up rage.
"Shut up," Harry growled, his voice low and menacing. With his free hand, he retrieved the vial from his robes and forced it to Draco's lips. "Drink this. Now."
Draco thrashed, trying to bite or spit, but Harry was unrelenting. He clamped a hand over Draco's mouth, tilting the vial until the potion poured down his throat. Draco choked and gagged, his eyes bulging in horror as the liquid took effect. A wave of magic rippled through the room, the air crackling with energy. Draco's body began to change—his features softening, his frame shrinking, curves forming where there had been none. His hair lengthened into silvery waves, and his robes hung loosely over a newly feminine form. Within moments, Draco Malfoy was no longer a he, but a she—stunned, disoriented, and trembling on the floor.
Harry stepped back, breathing heavily, a twisted satisfaction blooming in his chest. "Look at you now," he said, his voice laced with contempt. But the sight of Draco's transformed body ignited something darker in him—anger, desire, a need for dominance that he had suppressed for too long.
Without warning, Harry lunged forward and struck Draco across the face, his fist connecting with a sickening thud. Draco cried out, collapsing to the ground as blood trickled from her split lip. Harry didn't stop; he grabbed her by the hair, yanking her up and slamming her against the wall again. Blow after blow rained down—punches to the stomach, kicks to the ribs. Draco whimpered and pleaded, her voice higher now, feminine and desperate. "Stop, please! What are you doing? Why?"
Harry's mind was a storm of justifications. This was for all the times Draco had belittled him, for the way he had aided the Death Eaters, for the constant torment. He channeled his fury into each strike, feeling the satisfying crack of bone under his knuckles. Draco's body bruised and bled, her breaths coming in ragged gasps. Finally, Harry paused, his hands aching, his breath coming in heavy bursts. Draco lay huddled on the floor, sobbing quietly, her new form battered and exposed.
But Harry wasn't done. He reached into his robes and pulled out two more vials—virility and stamina potions he had brewed separately, enhancements from the same forbidden book. They promised heightened endurance, unyielding strength, and amplified desires. Harry downed them in one gulp, feeling the effects almost immediately: a rush of heat through his veins, his body thrumming with energy, his senses sharpening. His thoughts turned primal, the potions stripping away any lingering hesitation.
He advanced on Draco, who tried to crawl away, her limbs weak from the beating. "No, Potter, don't—please, I beg you," she whimpered, her voice breaking. But Harry ignored her, grabbing her wrists and pinning them above her head. He tore at her robes, the fabric ripping easily under his enhanced strength, exposing her newly transformed body—soft skin, curves that invited his touch, and vulnerabilities that made his pulse race.
Harry started with her mouth, forcing her jaw open with rough hands. He thrust himself inside, ignoring her gags and struggles. The potions made him relentless, each movement driven by a savage rhythm. Draco's tears streamed down her face as she choked, her body convulsing, but Harry held her in place, his grip ironclad. He took his time, savoring the power, the control, until he pulled away, leaving her gasping and coughing.
Next, he flipped her onto her stomach, her protests muffled against the cold stone floor. He entered her from behind, violently, without preparation or mercy. Draco screamed, her body tensing in pain, but the sound only fueled Harry's frenzy. The stamina potion kept him going, wave after wave of force, his hands digging into her hips as he drove deeper. The room echoed with her cries and his ragged breaths, the air thick with the scent of sweat and blood.
Finally, he turned her over again, spreading her legs forcefully. He entered her there too, his movements brutal and unyielding. Draco's mind seemed to fracture under the assault; she went limp at times, then thrashed in renewed panic. Harry's body responded with unnatural vigor, the virility potion ensuring he could continue indefinitely. Time blurred as he took her repeatedly, alternating between her mouth, ass, and what the potion had made of her. By the end, he reached his peak, spilling into her with a final, violent thrust. As he did, a strange magic surged—the book's warnings had mentioned that impregnation could lock the transformation permanently. Draco's body accepted it, her fate sealed in that moment.
Harry collapsed beside her, his body spent but satisfied. Draco lay there, broken and sobbing, her eyes vacant. He whispered something cruel in her ear—words about her new reality, her helplessness—before leaving her in the room, locking the door behind him. The next morning, whispers spread through Hogwarts of Draco's mysterious absence, but Harry played his part, feigning concern.
Three months passed, and the castle's routines continued amid the chaos of the wizarding world. Harry had almost convinced himself it was over, but then Draco reappeared—or rather, the version of her that the potion had created. She had managed to hide her condition, wearing loose robes to conceal the swelling of her belly. The impregnation had indeed locked her in her female form, and now she carried Harry's child, a twisted symbol of his dominance. Draco sought him out in the halls, her face a mask of desperation and rage.
"Potter," she hissed, cornering him near the potions classroom. Her voice was low, but her eyes burned with fury. "You think you can get away with this? I know what you did. That potion, the assault—everything. I'm pregnant because of you, and if you don't help me fix this, I'll tell everyone. Dumbledore, the Ministry, the whole damn world. You'll be expelled, imprisoned—worse."
Harry's stomach tightened, but he kept his expression neutral. He had anticipated this, planned for it. "Fix what, exactly?" he asked, his tone mocking. "You're the one who drank it. But fine, let's talk. Meet me in the old Astronomy Tower tonight. We can figure something out—privately."
Draco hesitated, suspicion flickering in her eyes, but the promise of resolution was too alluring. She nodded curtly and walked away, her hand resting on her pregnant belly.
That night, Harry led her to another hidden room he had prepared in the Room of Requirement, similar to the first but with more secrecy—dark drapes, no escape routes. As soon as the door closed, he struck. "Stupefy," he muttered, disarming her quickly before she could react. Draco staggered, but the spell only dazed her momentarily. Harry grabbed her, his hands rough on her swollen form.
"You thought you could blackmail me?" he snarled, pinning her against the wall. Her pregnancy had made her slower, more vulnerable, and Harry exploited it mercilessly. He tore at her clothes again, exposing her changed body, now marked by the bulge of the child within. Draco fought back, clawing at his face, but Harry was stronger, the memory of his potions lingering in his veins.
He forced himself on her once more, his actions even more violent in his anger. He entered her mouth first, gagging her until she sobbed, then flipped her onto her side to accommodate her belly, thrusting into her with brutal force. Her cries echoed in the room, a mix of pain and pleas for mercy, but Harry was deaf to them. The assault was longer this time, his stamina holding as he took her in every way, climaxing inside her again with a guttural growl.
As he withdrew, panting and slick with sweat, a cold resolve settled over him. Draco lay there, weeping and broken, whispering, "Please, just end it." Harry didn't hesitate. He wrapped his hands around her throat, his fingers digging into her soft skin. She struggled weakly, her hands scrabbling at his arms, but the life drained from her eyes as he squeezed tighter. Her body convulsed, then went still, the light fading from her gaze.
Harry released her, his hands trembling slightly from the effort. He couldn't leave evidence, so he turned to the book once more. A transfiguration spell within its pages allowed him to convert organic matter into inanimate objects—a simple incantation to turn her body into a piece of wood. "Mutatio lignum," he intoned, watching as Draco's form twisted and hardened, her features blurring into the grain of an ordinary log.
Without a second glance, Harry gathered the wood and carried it to a nearby fireplace in an abandoned corridor. He tossed it into the flames, watching as it caught fire and burned to ashes. The evidence disintegrated, leaving only smoke that curled into the night air. Harry walked away, his mind already compartmentalizing the events, ready to face the world as if nothing had happened.
In the days that followed, rumors swirled about Draco's disappearance—suspicions of Death Eater involvement, perhaps, or a runaway. Harry played his role perfectly, mourning outwardly while feeling a dark sense of liberation. The castle moved on, oblivious to the shadows he had woven, and Harry Potter, the boy who lived, carried his secrets like a shield.