Archive of Our Own ^beta

Chapter Text

Malvais Roche was the last of the Roches, a small pureblood family who made their living by hunting unicorns. They were never as powerful or rich as the Blacks or Malfoys, but they were well regarded as the finest unicorn hunters in the world. That is until the Wizengamot ratified the ‘Unicorn Protection Act’, making their primary source of income and family pride totally illegal. Of course, most of his family had believed they were above such a petty law. Unfortunately, they were proved wrong over and over again.

Now Malvais Roche was the only Roche left who wasn’t imprisoned, constantly drunk, or dead. The reason for this was that Malvais was creative and willing to adapt. Unwilling to leave his family legacy behind, he had closely examined every byproduct possible to extract from unicorns. Blood and meat were cursed. Horns, hooves, and hair could be traded- but their collection was strictly controlled by government agencies. No room for the freedom Malvais wanted. Waste products like piss and shit contained no unique magical properties (though even if they had, Malvais could hardly have lowered himself to that level). And only through this thought process did he arrive at his answer: unicorn cum.

No one had thought to try and harvest that, and so there were no regulations. And so Malvais Roche became the world’s only supplier, though he kept his identity and his methods secret. Turns out that unicorn cum had fantastic magical healing properties. But if anyone ever found out how Malvais collected the stuff, he would be in Azkaban faster than lightning.

Because Malvais Roche was a very bad man. Unicorns were smart enough creatures that they wouldn’t stick their dicks in just anything- but it was possible to entice them to fuck something other than another unicorn. They primarily identified wizards by the traces of magic that wand use left, and they wouldn’t approach any humans but the purest virgins. Malvais had been ecstatic when he realized: unicorns were fond of children. They had no interest in muggle children, as those lacked any magic to calm the beasts. But unicorns were known to let young magical children pet, and sometimes even ride them. Malvais thought that- given the right stimulation- unicorns might not object to fucking them. Malvais, who enjoyed fucking young boys himself, was willing to test the idea. And he had been right.

As he had done many times before, he met one of his like-minded friends on the Obliviation squad. When the man got called to wipe the minds of a suitable muggleborn’s parents, he would make sure to put the parents into a deep state of sleep for the night. Then he would drug the boy and contact Malvais. Malvais pulled up to the country home where his newest victim lived. He hated the muggle methods his job required: muggle drugs to keep the kid unconscious, muggle transportation to deliver the boy to the unicorn mating grounds. But unicorns were hypersensitive to wand-based magic, and they would feel the traces of a stunner or apparition all too strongly. Any magic cast directly on the boy had to be limited, or it might scare the unicorns away.

His friend was waiting at the door, the drugged boy slung over his shoulder- though still completely dressed and unmolested. That was the deal after all. The obliviator would obtain the kid and hold off on any sexual contact. In turn, Malvais would give the man a cut of his profits, and return the boy with a gaping, perfectly fuckable hole. Then they would be free to commit all manner of depravities for the rest of the night.

The muggleborn was a pretty boy, small for his age with pale skin and a thin frame. Malvais couldn’t wait to see him mounted and ruined by a unicorn’s cock. Sadly, he couldn’t even enjoy the fantasy beforehand. Both he and his friend were forced to wear amulets which would keep them from becoming aroused while handling the boy. Or else the sexual intent would reflect in both men’s magic, and traces of both men’s desire would linger on their victim. Perhaps that wouldn’t be enough to scare away unicorns most of the time, but any sign of impurity would ruin any chance of a unicorn falling for the illusion.

Malvais carried the drugged boy to his van. There he cut every stitch of clothing off the kid, leaving him completely bare. He allowed himself to take in the image of the muggleborn, delicate and vulnerable, the cold night air raising goosebumps on bare limbs and pebbling the kid’s nipples. He might not be able to properly enjoy it, but he would definitely be revisiting the memory later.

The back of the van was rigged with a special seat, perfectly molded for the boys it was made for. Malvais strapped the boy into position. Padded restraints, designed to cause the least amount of unexplainable bruising would keep the boy bent into a fuckable position: head and chest lowered, legs spread wide, and ass raised. Malvais loved the design. The boy’s tight, virgin hole was on full display and his small dick and balls would dangle and bounce charmingly with the motion of the van. Not that he could play with those yet, but it was a tempting sight.

Before he could depart, he had to begin the preparations. Through trial and error, Malvais had discovered that virginity was about contact and intent. The amulet removed intent from the equation. Even the sight of the boy bare and spread for the taking failed to arouse the usual lust in the wizard. The trickiest problem had been figuring out how to prepare a kid’s virgin hole to take a cock the size of a grown man’s forearm, considering that he couldn’t make any physical contact with the tightly clenched hole. He had needed more creative thinking for that.

Arranged carefully on the floor of the van were three cauldrons. Picking up a large syringe, he took a vial’s worth of liquid from the first cauldron. It contained a cleansing that would remove any filth and help rid the muggleborn of a normal human’s scent. He fixed a narrow rubber plug to the end, coated it in lube, then pressed it hard against the virgin hole. Even that small of a plug was a struggle to force inside the boy. The muscle finally gave way with an audible squelch and Malvais filled the boy’s entrance with the cleansing fluid. Leaving the rubber plug in place, he removed the syringe from its connection and continued to add cleansing solution to the boy’s passage until it began to leak out around the narrow plug. The boy’s insides were still too narrow to allow the thick liquid very far inside him, but at least the first section would be clean.

Malvais calmly dug at the plug with the tip of the syringe until it slid free. Thankfully, the floor of the van was enchanted to vanish any messes, so the gush of liquid from inside the boy disappeared as soon as it hit the ground. Then Malvais turned towards the second cauldron. This one held a mixture of lube, muscle relaxant, and healing potion. It would help the boy’s insides tolerate the rapid changes he had planned. Using a slightly larger plug, Malvais repeated the procedure.

Then he retrieved his finest creation. He had solved the problem of stretching a virgin hole open with a magical tool. The specially designed colon snake was one of his favorite objects. In a dormant state, the metal was slimmer than his index finger, and half as long. At the base was a barely noticeable budge which functioned as a plug to keep it lodged in place. The subtle magics imbued in the metal would be undetectable to a unicorn. And, as he had carefully worked the enchantments on the object with his sexual intentions magically nullified, the results of its use wouldn’t technically count as a loss of virginity. No matter how ruined the boy’s hole became afterwards.

The little hole, after being stretched by small plugs and filled with lube, accepted the thin metal instrument easily. Malvais fixed his snake deeply in place using a strip of sticky muggle tape, then settled in for a long drive. It was four hours until the nearest unicorn preserve. Plenty of time for the boy’s tight ass to adapt to its new shape.

After an hour, Malvais allowed himself to pull over and check on the bound muggleborn. He delicately peeled away the tape. Despite the work of the healing solution, the hole was swollen and pink around the expanded base of the metal, now over two inches wide. From his previous experience, Malvais knew that meant the tip of the snake was now fourteen inches inside the boy’s passage. He watched the spectacle impassively.

The enchanted colon snake didn’t just grow, it writhed, churning the boy’s insides as it prepared the kid to take the massive cock of a unicorn. Even drugged into unconsciousness, the small boy was twitching and trembling at the sensation. Malvais figured that the kid’s untouched prostate was getting a thorough pummeling by the tool. The drugs he used didn’t leave the boy’s cock capable of getting hard, but the glisten of the leather seat told Malvais that the stimulation had already forced one orgasm from him. Not that there would be another, as the colon snake grew another foot inside the boy, any possible pleasure would turn to pain. Not that it would matter. The boy’s insides were just going to have to adapt to a new shape tonight.

Satisfied, Malvais reapplied the tape and began to drive.

Chapter Text

By the time Malvais reached the overgrown muggle logging road leading into the forest. Any upkeep on it had stopped when the area had been designed a reservation for magical creatures. A combination of a muggle repelling ward and hazard signs falsely claiming chemical leaks kept the land free of trespassing muggles. Wizards, were likewise discouraged from entry by wards to prevent poaching. This would have been inconvenient for Malvais, if he hadn't been the one to create the reservation in the first place. Under the pretense of atoning for his family's past, he had become a leading force for unicorn conservation. Best of all, his desire to encourage large and healthy unicorn herds was entirely genuine. His efforts rewarded him with a secret ward key into a completely private forest filled with unicorns ready to mate.

Killing the van's headlights, Malvais slowly drove by the light of the full moon to his normal site. He loved nights like this one, since the moonlight gave him a crystal-clear view.

The boy was still tightly restrained, face down and legs spread, in the back of the van. The enchanted toy’s growth had slowed, straining against the current limits of the kid’s virgin body. Malvais closely examined the boy’s stomach. It was hard to make out how deeply the colon snake had progressed. But a few moments observation revealed a faint spasm as the toy twisted in a different direction. Good, it was probably deep enough. Examining the stretched rim revealed that it had only expanded to three and a half inches… at least a half inch below what the kid would need to survive the night’s breeding. But he had added so much healing solution, it would probably be fine. With a smirk, he spanked the protruding end of the toy in mock frustration, forcing it even deeper.

As much as he wanted to keep playing with the little slut, there was work to do. Malvais reached down to grab carefully designed handles built into the leather bindings. Making sure not to touch skin, he carefully hauled the limp boy from the van. The kid's limp body hung from the straps- legs bound ankle-to-thigh, forearms bound behind his back, and completely unresponsive save for subtle shifts and shudders as the muggleborn's body reacted to the large object squirming inside of him.

Hefting the child, Malvais set off, following an overgrown path that wound its way deep into the forest. He made his way past his older test sites, following the secret trail to its end: a spacious clearing at the heart of the woods. It was a strange place- a perfect circle of grass surrounded by a smooth line of trees. There were no unruly weeds or young trees taking advantage of the break in the canopy. Aside from several moss covered stones, the ground was completely level. It made Malvais nervous, nothing that flawless stayed that way without a cause, though had yet to find anything significant.

This was his first time using the site for his work. It was an ideal spot: a central location surrounded by easily passable growth, with good visibility and plenty of space. He hadn't wanted to risk using it until his procedure was perfect. Malvais felt deeply satisfied as he took his first steps into the meadow.

At first glance, what occupied the center of the clearing appeared to be a gleaming unicorn. Malvais had set the thing up weeks ago, giving the natural energy of the forest enough time to overwhelm any trace of his magic. The statue had been specially crafted from magically purified silver, forged into thick metal bars, then enchanted to twist together into a cage with an abstract silhouette of a horse. Smaller twists of silver wire twisted together to form ghostly details. It had been incredibly expensive, but Malvais's product was so rare that it had only taken a single successful harvest to cover the cost. The statue couldn't break, be pushed over, or allow a stray hoof or shift in equine bulk to cause damage to tonight's breeding sleeve (issues Malvais had encountered during his first attempts, requiring him to interrupt the process and heal his unlucky volunteer).

The metal also carried enchantments that reacted to a wizard’s ambient magic. Malvais was shielded, but tonight's toy wasn't and the material reacted. The previously solid metal began to flow like lines of quicksilver. Placing the boy face down on top of the statue, the kid was quickly engulfed and dragged downwards. The existing restraints kept the kid's legs bent and arms bound, since there was no need to remove them. As he sank, the boy's body was forced into a mating position.

First, was the slow slide of the body at a downwards angle until the boy’s ass settled against the back of the structure, his asshole positioned to occupy the area of a mare’s vulva. Folded legs were then pried obscenely wide, thighs forced up to either side of the boy's torso. Once the kid’s lower half was in place, the rest of the boy was pulled lower, finally settling with the kid's back forced into an arch that highlighted the curve of his stomach. Metal tendrils crawled over bare skin, twisting around every inch of virgin skin until the boy was caged in a lattice of silver. For his own amusement, Malvais had designed the structure to leave the occupant’s head, chest, and cock uncovered. He liked to see the children's heads lolling, chests heaving, and little cocks jiggling while they served the unicorn stallions. Occasionally, one of the children would be developed enough to have an orgasm or two, which was always fun to watch.

Of course, the important bits were left completely bare. The kids stomachs were cum buckets after all and needed plenty of room to expand. The kids assholes... well that was obvious.

Once the metal settled into place, there was no going back. Unless the statue was completely destroyed, nothing would be moving its contents until the moonlight waned. And the statue could withstand a battering ram...

It remained to be seen if the little boy's asshole could.

Once the breeding bench's structure stopped moving, Malvais approached and examined the fit for any issues. The position spread the kid's cheeks so widely that it looked like a flat plane of skin surrounding a stuffed hole, which by now had been stretched so wide that only a thin band of bruised flesh was visible around the toy inside.

Finally, Malvais reached for a storage pouch and took out a large stainless steel cauldron with a tightly clamped lid. The iron chamber was another of his original designs. It was round, like a barrel – but with perfectly straight sides like a polished cylinder. The smooth interior made it easy to clean, which was crucial given its contents. From the same pouch, he grabbed a length of hose and a large rubber nozzle that could expand in size. He may not like them very much, but muggles did make some very useful items.

He then connected the hose to a spigot at the bottom of the cauldron. Malvais smirked as he adjusted the nozzle to match the current size of the colon snake. He needed the boy's insides sealed tight for this.

Grabbing the base of the snake with his free hand, Malvais hauled on the protruding end of the thick toy, which began thrashing as if trying to stay lodged inside the kid. It was certainly a sight to see, but ultimately futile as Malvais dragged it out inch by inch, the still active enchantment stirring the boy’s stretched and battered rim.

The moment his slut’s ass was empty, Malvais strong-armed the nozzle into the waiting hole.

The fit was already close... but the larger size would only help the kid deal with things later. Malvais increased the size until the boy's rim strained, the skin pulled completely taut.

Finally, he reached into his pocket for what he considered to be vital protective equipment: a pair of nose plugs. Not for the first time, Malvais wondered how the mudblood’s unconscious mind processed sensory information. His Obliviator friend Anton claimed that it was practically impossible to remove all aspects of an obliviated memory. The memory of the experience was easy enough to erase, but sensory experience often became so interconnected with the subject’s background sensory recall that it was beyond difficult to pry specific sensations out from a person’s awareness. Malvais really got a kick out of the idea that the potent scent of horse piss would shortly be burning itself into the 10 year old’s sinuses.

Trying not to breath, Malvais finally removed the cauldron's lid.

The smell was immediate and overwhelming, even through his blocked nostrils. Strong, sharp and acrid, with a slightly sweet undertone: the smell of horse piss. Specifically, piss collected from a summertime mare. It was the key ingredient to Malvais's enterprise. Unicorns might be willing to tolerate young and pure humans, but that alone wouldn't lure them to the clearing, much less arouse them to act. With some trial and error, Malvais had discovered the secret ingredient. The smell was a mare's urine was repulsive to humans, but to a stallion's nose? It was a direct invitation. Unicorns may be fantastically magical, elusive creatures – but they shared many traits with their non-magical brethren. Taking advantage of that, Malvais had painstakingly collected large volumes of piss from mares in heat and concentrated it. Added to a modified healing potion as a base, the final product was a slippery, viscous sludge that would ooze rather than flow and emitted a scent strong enough shout to the entire preserve "I’m a fertile lonely mare, who desperately needs breeding!"

With a twist to the spigot's valve, the cauldron's enchantments activated and the lid began its slow but steady journey downwards. The potion was too thick to flow by only gravity’s pull, so Malvais had modified the heavy lid of the cauldron to act like the plunger on a syringe, forcing the mixture through the connecting hose in strong spurts.

Malvais watched the cauldron empty and the boy's insides fill. Thanks to the earlier treatments, there was plenty of room in the kid's intestines. It was an extra-large cauldron, and the volume it contained caused the boy's belly to hang heavy and rounded beneath him.

Once every drop was drained, Malvais returned the empty cauldron and hose to the storage pouch. Checking that everything was in order, Malvais readied himself and gripped the base of the nozzle. In one merciless motion, Malvais hauled on the base of the plug. The large size and thick ooze inside formed a tight seal, resisting the pull, until it finally relented with a loud, wet squelch.

Nozzle in hand, Malvais took off towards the edge of the treeline. He had constructed a small platform to observe things, made invisible and heavily warded against sight, scent, sound, and any means of detection that he could imagine. Once inside, Malvais stowed the dripping plug, thoroughly cleaned his hands, and sat back to admire the scene.

From above, only the rear end of the mudblood was visible. But from his nearby warded shelter, Malvais would be able to see every moment of each encounter. He watched as the boy's gaping hole tried and failed to close, the motion coaxing the first gush of thickened piss from the kid's insides. Instead of flowing from the filled body like a normal liquid, the piss had congealed to a thick, sluggish slime. It oozed past the boy's rim in a slow seep to splatter wetly against the earth below. Malvais hadn't bothered to remove his nose plugs, but he knew that the powerful scent of the slop would have already filled the clearing. Soon the night's gentle breeze would waft pheromones screaming of a desperate mare in heat through the surrounding forest.

With such a powerful lure, Malvais knew it wouldn't be long before a suitor would arrive to put the little boy's hole to good use.