FSE

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Knowledge had always been a plague to Maribel. The more of it she acquired, the more she wanted to know, creating a vicious cycle doomed to repeat itself, until she could somehow gain all possible knowledge, something she knew was impossible.

She had four experiments at this point, only two of which had been willing, although the girl called Lily was starting to grow on her, both literally and figuratively. While Lily hadn't been expecting the changes in the slightest, she had grown accustomed to them very fast, especially compared to the other three. She displayed the most interest so far, something beyond simple curiosity. She was full of potential.

The other three had remained relatively uninteresting beyond their initial transformations. It was as if they had gotten more than they bargained for, and Natalia, the raptor girl, almost seemed to regret her decision. In Grace's case, the change had been limited enough to hide by wearing nothing but a hat, which allowed her to continue living without too much animosity towards Maribel. As for Kathleen, there had been no further contact, so Maribel simply assumed the woman was content in her situation.

Maribel's research into this strange phenomenon had led her to only one conclusive observation. There had to be some kind of direct contact between her and the other person. That alone didn't quite seem to trigger the change, but in all cases, it was necessary. Beyond this fact, Maribel could only guess as to why this was happening. She had also been able to determine that she couldn't make her own body change, as if she was immune. She didn't know why she had such power contained within herself, but she knew she had to be careful with it. Knowing this, she had made the decision to limit her bodily contact to a maximum, by wearing clothing to cover as much of her body as possible as well as gloves for her hands.

Doing this only seemed to cause different kinds of problems, however. As the days passed by, tension increased in Maribel's hands. The feeling was something akin to the tickling feeling caused by a very weak shock coupled with a slight numbness one receives when one of their limbs fall "asleep". The first few days had been manageable enough, but after a week had passed, the feeling had gained in intensity, and was no longer confined to her hands alone, gradually spreading throughout her body.

Maribel had a strong feeling of why this was happening to her, even though she didn't quite want to admit it to herself. Whatever had caused her to transform others through touch hadn't started a long time before, but at this rate, she would have to keep going like this for the rest of her life, or until she found a cure. It was clear to her what had to be done.

Maribel had made a few phone calls after making the choice to continue her experiments. In a worst case scenario, she would at least be able to release the energy released within her. If things were to turn out better, her experiments led to the possibility of giving her some insight on her situation, not to mention the curiosity and interest which could be satisfied in the volunteers.

The first volunteer to come see her that week had been a young woman named Zoe. She seemed very excited about the procedure, and Maribel had been able to deduce that this girl was likely studying in medicine or biology, by her knowledge of human anatomy. It almost seemed very risky to Maribel to ruin a potential surgeon's hand by giving her a new type of hands or eyes. She had simply told herself that the girl would adapt, and she seemed very eager, anyway. Maribel was also in somewhat of a hurry of her own, desperate to shed off the uncomfortable feeling of numbness coursing through her body.

As usual, the change itself had been very simple; Maribel had only needed place her hand on Zoe's. To Maribel's shock, the release of the mysterious energy had been very quick and sudden, as if it had been entirely transferred to the girl in an instant. To Maribel, the feeling was exquisite, as if the weight of the world had lifted from her shoulders. She felt free and disconnected, as if she had attained pure enlightenment.

This feeling had made Maribel unable to notice the changes happening to Zoe, which seemed to be in a state of euphoria of her own. While Maribel's reaction had been more of a release, Zoe seemed to have had a sudden climax of emotions, very similar to what she would have had with a sexual partner. Zoe's loud gasp filled the room, a gentle scream which softened down to a low moan as the changes happened.

The sound of the chair shattering into many pieces had been drowned by Zoe's excited exclamations. Her weight increased very quickly as her body began to take on a completely new shape below the waist, while leaving her completely unchanged on the other half of her body.

The changes began at Zoe's feet, as all of her toes seemed to merge together, while the former toenails expanded and grew, spreading along the bottom of each foot to become thick, dark hooves. Her legs quick took on a new form, first by extending her actual feet. This caused her to feel like she was standing on the tips of her toes, at first, as her heels moved upwards to become a horse's fetlock joint, giving her the appearance of having knees pointing backwards.

The changes kept progressing upwards, as her legs thickened at some spots and thinned at others, until they became identical to a horse's hind legs. Brown chestnut fur quickly grew out to cover her bare skin, shining softly in the room's ceiling light. As well as taking on a new shape, Zoe's legs had also grown longer, enough to nearly compare to those of an actual horse. This made her torso appear strangely short in comparison.

The changes were not quite over yet, however, as Zoe's furred hips distorted and eventually split, as a new pair of legs appeared to grow out towards the front. This new pair of legs was already identical to those of a horse, complete with fur and hooves. It was as if those legs had just pushed themselves out from Zoe's body, until the hooves could rest on the ground.

During the short period of time during which the new pair of legs grew out, Zoe's bottom was pushed back further and further, as her original hips seemed to slide away to let room for a new pair. This eventually caused her to grow out the back of a horse, while still leaving her original upper body standing upright atop the first pair of horse legs. This left her with the body of a centaur, a mythical mix of human and horse.

The tail was the last to grow. As if her spine was not long enough already, running vertically down from her head, to where the human and horse halves mixed together, leading back horizontally for about the same length, it seemed to stretch out into a beautiful bundle of thin keratin hairs, as black as the human hair on Zoe's head.

Unlike the previous cases, Zoe's transformation was also very sudden, completely finished by the time Maribel had snapped out of her daze. From start to finish, it had likely taken less than five minutes, while the previous transformations had been much longer, depending on their intensity.

By the time Zoe's mind was back in its place, the transformation was already complete. Her eyes had gone wide as she looked down at her new lower body, her waist twisted as best as possible to take a look behind. The feeling of her hands against the soft fur which was now her legs confirmed that this was indeed the reality she would be in from then on.

"Is this... You didn't give me any kind of hallucinogenic drug, did you?! Is this really my new body?"

Maribel nodded with a reassuring smile. This particular even had led her to come up with a rather simple explanation. The longer she waited; the tension would build up within her own body. With more tension having been accumulated, the transformation caused by the release of energy would have a greater speed and strength, leading to much more important changes happening in much less time.

This all went without mentioning the feelings received by both Maribel and her target. The mysterious energy seemed to have a slightly sexual tint to it, as its release would cause stimulation in both bodies very similar to the kind received during sexual excitement.

The goal of Maribel's experiments was no longer simply highly advanced research, but also a personal way to elate herself.

Thus, Maribel had waited even longer to proceed with the next test. In Zoe's case, she had been a week without releasing her energy, and she already needed quite a bit of effort to restrain herself. In her next attempt, she had nearly reached the edge of madness by the tenth day. The sensation was incredibly powerful, causing the slightest of her movements to trigger a desire to release the energy. She needed the most discipline she could muster to keep herself from simply reaching out towards a random stranger walking down the street.

She decided to release it on the twelfth day. Her voice had been quivering too much when she had tried to contact the next volunteer by phone, so she had to do it by email. She hadn't even bothered paying the slightest attention to the woman's personal details; she simply wanted her over as quickly as possible.

The woman whose name Maribel didn't know arrived shortly after. By the time she had introduced herself as Nancy, Maribel's hand was already on her neck, which caused the researcher to scream loudly in pleasure. While Maribel's eyes were shut tight, Nancy's went wide as the energy coursed through her body.

The changes had begun almost instantly. A single horn suddenly sprouted in the middle of Nancy's forehead, a thin monolith of ivory, patterned with a downward spiral. It reached about thirty centimeters in length, leaving it slightly longer than her human face, which remained human in appearance. The eyes and ears were the only other details to change from that area, with the eyes taking on a faint white glow, while the ears moved upwards atop her head. They had taken on a very equine appearance, standing straight towards the ceiling and covered in thin, white fur.

The very second the energy transfer had stopped flowing from Maribel's hand, Nancy dropped down on all fours. Her feet and hands quickly took on the shape of hooves, much like Zoe's before, but the legs and arms themselves retained their human appearance. The white fur present on her ears had also began to cover the arms and legs. Within a mere few seconds, it had spread across Nancy's entire body, even the areas that had stayed human.

An equine tail rapidly poke out from above Nancy's pants, and much like the rest of her equine features, it was as white as snow, in addition to being very long. Apart from this, the only other visible change was that Nancy's legs had shortened slightly, while her arms and become slightly longer. The result of this was that Nancy's four limbs were now much closer in length, so that the fact that she stood on all fours didn't seem as unusual as when an ordinary human would do so.

There was however another change which would remain completely invisible from the outside. Not only was Nancy still clothed, her quadruped posture made it so that this last change remained very well hidden. It turned out the transformation had caused a change between Nancy's legs, which had caused her genitals to switch from female to male. Like the other changes, this had happened very quickly, but Nancy was certainly able to feel something unusual in that area. Her jeans, very clearly suited to a regular woman, were now bulging along the front.

By the time it was all over, Maribel had once again returned to reality. She quickly inspected the woman before her, standing as a quadruped despite her mostly human appearance. Maribel had no idea that this unicorn woman had more than a single horn, either.

Nancy's ecstasy seemed to last slightly longer than Maribel's, and a more careful inspection would have revealed that this excitation was very soft and limp by the time Nancy had calmed down. The woman looked up and smiled, her voice still perfectly natural and human. She simply had to tilt her head upwards, as a result of her posture.

She seemed to really enjoy the change, as if it were a childhood dream come true. While the opinions of her new body might vary, she felt she had become a real unicorn. She was thrilled, maybe a little too much for the safety of her pants. The thought of never being able to walk on two legs again didn't seem to bother her in the slightest. Instead, it filled her to the brim with excitement.

"This is... You never mentioned that this would be so amazing!"

Maribel smiled back, but she wasn't exactly quite sure what had happened. The last few days had been like a dream to her, as if her mind had been temporarily altered by drugs. By then, she had already seen a centaur and a n?ga, so the idea of a humanoid unicorn didn't seem that unusual to her.

"I'm sorry... What was your name?"