So that´s how it feels...
Twilight stood opposite Twilight.
One a young female human with dark blue hair streaked with one purple and pink strand and the other a great, lavender royal alicorn princess with the same hairstyle likewise.
Both stood wordlessly facing each other in the throne room of the young princess's personal castle, silently gazing into each other's bright and intelligent eyes. Whereby the human Twilight had to look far up at the alicorn to even see her snout. With a good two and a half meters, the alicorn princess was surprisingly quite tall for a pony. If you even still could consider her that instead of a horse. Although princess Twilight was of course an alicorn...known to be quite tall and imposing generally.
"Sooo...did I understand that correctly," alicorn Princess Twilight Sparkle began slowly to her smaller human version. "You want me to cast a spell on us two so we can switch bodies as you'd like to know what it feels like to be a pony respectively alicorn in my case?"
Twilight Sparkle - the human - nodded sheepishly.
"No!"
Human Twilight's features fell, but the princess continued before she could say anything.
"By that I don't mean that I reject your idea, but I can't use a real body-swapping spell on both of us. It would be far too dangerous for you, plus you probably wouldn't survive it in the first place for a single second to begin with."
Now Human Twilight was surprised.
"Huh what? Why is that?"
"Well it's quite simple. An alicorn is not a normal pony like the rest of the three species on Equus. First of all, we are extremely rare and as you know there are only four of us. Also, we are blessed with nigh infinite divine powers and eternal life. Unfortunately, this also means that our bodies have to be much more powerful and sturdy than any other pony's to wield and control such immense power."
The second Twilight nodded and waited to hear what else came from her alicorn self.
"If I were to use a body swap spell or bind your spirit directly to my body - effectively both almost the same - it would shatter your entire spirit and mind into millions of tiny pieces. No harm would come to me, thanks to my alicorn invulnerability, but for you it would clearly be the end. We don't want that, do we?"
The other Twilight shook her head frantically. That didn't sound like an experience she particularly wished to undergo at all.
"Is there any other way? From the sound of it, you seem to have an idea," Human Twilight tilted her head to the side and looked into the tall alicorn's violet eyes.
"Yes there is", alicorn Twilight grinned down to her smaller self. "It's a type of trans modification, a partial temporary body part swapping."
"And that doesn't count as swapping the body?" The other Twilight sounded skeptical. "Sounds pretty much like the same thing to me."
"For simple minds it is - but no. As long as I don't fully swap your body with mine, you're in no danger. May I explain, if you're interested?"
Human Twilight nodded eagerly and turned her gaze higher to the alicorn's muzzle.
Without further ado, Princess Twilight began.
"So the spell lasts for exactly sixty minutes and then reverts us both back to our old selves beside each other. I would suggest that I exchange your torso with as much of my body as safely possible. It will grant you the strongest and closest feeling of what it's actually like to be a real, full-blooded alicorn without running the risk of having your mind torn to shreds."
"Since we are quite similar mind-wise, I can already answer a question you are about to ask me anyway.”
“For the duration of the partial body swap, I will put my mind into a dormant state and awaken from it on my own when the spell wears off."
"Thus, I am able to control my many and powerful alicorn abilities and the alicorn magic that comes with them without any distractions. By doing so, I can protect you from it in the worst case scenario. Whereby I am very very sure that it will not come to that even."
Human Twilight raised her eyebrow in surprise.
"Is that all there is to it? That sounds almost too easy to be true."
Princess Twilight seemed to be extremely proud of herself, because her voice almost cracked as she answered her human self.
"It's true. Not everything has to be absolutely complicated, does it? Some things are simple as they are, although my alicorn magic helps quite a bit and makes it easier. After all, such a partial body swap without danger requires incredible concentration of the acting side and a gigantic pool of mana or magic as you humans call it."
"However, I wouldn't worry about both of that if I were you. As an alicorn I have a far sufficient pool of mana and as the alicorn of magic I probably won´t even notice the amount of mana I will need."
"If that's the case...let's best get started right away," human Twilight grinned widely across both cheeks and her smile was returned by the alicorn princess as well.
"You're quite welcome. In order for me to cast the spell, though, you'll have to take off all your clothes, please," she heard the princess reply to her.
Her face turned skeptical as she turned her body to the alicorn.
"Pardon, what? Why should I do that? You know we humans always wear clothes and don't really feel comfortable in front of others without them. Yes we have known each other for a few weeks now, but still. This makes me uncomfortable."
The alicorn princess laughed, but then lifted her hoof to suppress it and smiled at the other Twilight.
"I don't wear clothes either, after all, and I'm not embarrassed."
"You are a horse! - Sorry pony. As a matter of principle, you never wear any clothes except on special occasions. For you it´s normal to walk around basically naked. Especially since you have your long, flowing tail and fur, that covers most of it nicely," Twilight interrupted her alicorn counterpart.
The young princess grinned mischievously and knowingly. "True enough, but I want to prevent anything from happening to you when I cast the spell. Your clothes are surprisingly sturdy when it comes down to it, and I don't want you to strangle yourself. So if you would be so kind?"
With no relevant counter, Twilight slowly set about removing her clothes and laying them neatly folded to the side on Princess Twilight's crystal map table. As she did so, she cast a skeptical glance or two at the lavender alicorn, who stood silently opposite her, waiting.
Soon she was standing completely undressed in the middle of the crystal throne room, her cheeks reddening slightly.
"You look fine," Princess Twilight acknowledged, "I don't even know why you should be ashamed of your body at all. It's well defined and attractive to look at. Even I as a mare can see that." Princess Twilight chuckled, "besides, it's nothing that my ongoing extensive research of the human body hasn't already taught me myself anyway. Nor anything in general that would really be different about you than about me. We're both female and have the same genitals and further equipment, just in different positions, sizes and shapes."
Human Twilight waved her hand back and forth in front of her face, but she couldn't quite push the thought out of her mind. As it was, Princess Twilight was right; there really wasn't much different in her human and the alicorn's equine nether regions. As crazy as the thought somehow sounded.
"Enough enough!," she distracted with her voice pitching in mild embarrassment. "Please let's get started, this is genuinely embarrassing enough for me already."
Princess Twilight smiled. "Of course my dear Twilight, with pleasure."
The alicorn's long horn began to glow with a soaring, dazzling light. After two seconds Twilight couldn't even recognize the alicorn across from her in the bright glow. She was forced to squint her eyes tightly to keep from being blinded by the glare emanating from the alicorn's horn.
A second later she heard a puff of magic and then felt a brief tug in her lower half, whereupon all sound faded entirely to nothing.
The bright light died down and Twilight at last could begin to see after squinting her eyes several times and blinking the multicolored dots out of her eyes.
Twilight was then almost overcome by a wave of incredible sensations, experiences, and a powerful awareness of her suddenly seemingly far more massive body and its tremendous strength. She felt her body unintentionally move upward and something massive momentarily leave her sides. A brief moment of weightlessness followed as she lingered there briefly and then fell back to the crystal floor with a dull clack of something hard.
Whoa! Did it work? By the feelings, I think so.
Her question was settled when she lowered her gaze and her mouth opened in unbelievable amazement.
Where her human torso was supposed to blend into her crotch, there was a clear line separating everything. Her human flesh ended there and continued into the lavender fur of Princess Twilight just below.
Twilight looked down along her old human body and then down further along her new body to the pristine crystal floor. She also turned her upper body backward to look there as well. As she had already rightely guessed, her body perfectly carried on their into the alicorn's far large equine body. Princess Twilight had merged them both and made them into an awe-inspiring centaur for the next hour.
Truly magnificent.
Twilight conjured a mirror to her hand and skimmed every inch of her old human and new animal body.
The first noticeable feature was that she was now quite a bit taller. Her upper body had not changed physically, but it was now perched on the massive body of an alicorn that itself hadn't diminished in size. That gave her a much wider overview of the entire room in general.
She also noticed that everything above her crotch was still exactly as she had come to know it in the last 21 years of her life.
Her pale skin with her flat belly and his navel in the middle. Her chest, also flat and relatively firm for a young woman, was still muscular as ever. The same could not be said for her breasts, however. She surveyed them with pride, noting in the back of her mind that her breasts still had their stately cup size of double C if not D.
Her face was still as it had always been and her sharp violet eyes roamed over the rest of her head. Her long hair had grown even longer and now fell almost to the end of her human body behind her. Twilight found that her hair now looked more like a mane, which would suit her new body, after all.
Her eyes widened as she looked up at the front of her forehead. That very easily explained where she had gotten this mirror from so suddenly.
A spiral, straight and long horn was growing out of the base of her forehead. Yet it was noticeably a lot shorter than the one that normally adorned the alicorn's tall head. Nor did it curve backward toward the top as it did with Princess Twilight. But she could still sense an amount power unlike any other behind it that was pulsating in a truly unique and powerful fashion. Size did not always have to matter, that was what's undeniably.
The rest of her head remained unchanged, and she hadn't received any cute lavender pony ears - a shame, really.
Twilight lingered on her human body for a few more seconds before lowering her gaze back down to her crotch, finally getting to the part that was really of most interest in her transformation or fusion as she should better call it.
As she had already noticed herself, her human vagina was no longer apparent, and where it should have been placed was now only her pale human skin.
Underneath? Well to put it bluntly, it looked as if someone had completely removed the head down the neck, throat and all the way down to the alicorn's shoulders and instead placed her human torso on top of the rest of the alicorn's massive beautiful lavender body.
Her pale human body now seemingly sprouted directly from the alicorn's lavender shoulder blades with her butt partly merging into Princess Twilight's whrist - or at least it looked like it did. Except that no scars or injuries were apparent in this divided transition of human to pony. It looked as if she had always had this exact half-human-half-animal body her entire life: as if she had been born with it.
Twilight suddenly had a tremendous respect for the alicorn's abilities and what she could do with them. Twilight had already had a lot of respect for Princess Twilight, and not just because the alicorn was a royal princess of Equestria. No, she had been aware from the beginning that the young alicorn was quiet powerful and gifted. Only now, for the first time, she became truly aware of how all-powerful the alicorn really was.
Intuitively, she knew that no pony in all of Equestria, except the alicorns of the kingdom, could accomplish what Princess Twilight had just done. And even the other three royal alicorns would certainly have had difficulty performing the spell so easily. The lavender alicorn was extraordinarily gifted in magic as the embodiment and protector of the same power. She had a pool of mana at her disposal that was unmatched by any.
Twilight glanced below her crotch and surveyed the two muscular strong pony limbs that naturally extended straight down to the crystal of the ground below. Both legs were covered in plush thick lavender fur and there were the same tufts of fur at the base of her hooves to her legs that she already knew from the alicorn princess. The muscles in the legs a characteristic of earth ponies and the tufts of fur that of a unicorn.
Once more she turned her upper body backwards, which was a playful ease for her. The transition of her human body into her pony-alicorn one was simple and just perfect. Her mobility was not restricted by anything.
As she had already recognized, her new equine-like body extended in a right-angled offset from where her butt ended well beyond it. She let her gaze glide very slowly over her entire equine body in order not to neglect any detail of her temporary animalistic half. She only stopped when arriving at the base of her alicorn butt's tail.
With a slight tilt of her upper body to one side and then the other, she skimmed over the two cutie marks that were now on her pudgy but steel-hard muscles flanks to the left and right. STOP! Still located, for she now had the nearly entire body of an alicorn affixed below to her human torso. It might not have been her personal and usual body she had normally but it still didn't change anything about the fact it was the mighty alicorn body of Princess Twilight and remained just that uncaring for who exactly sat atop her royal shoulders.
Her eyes next became fixed on her beautiful flowing pony tail. It was growing straight out of the base of her hindquarters from her dock and extended almost to the ground. It probably even would brush against the ground while she walked around if it wasn't constantly waving in an unseen current of magical force of divine alicorn magic. With a slight movement of her muscles needed for it, she flung it back and forth laughing to herself. Experiencing how it actually felt to be pony - or most of it anyway. At the base of her tail, she also spotted some short lavender feathers growing out of it. One of the natural characteristics for Pegasi she noted.
Next, she turned her gaze to her toned flanks and the impressively huge wings of the alicorn's body. Realizing that these had almost certainly been the ones that had detached themselves from her sides suddenly, seconds after the light of the spell had faded.
Twilight now unfolded first one and then the other wing of the lavender alicorn's body from her sides. Carefully inspecting every feather and contour of her gorgeous alicorn wings. She had seen her princess friend spread out her wings to their full span before. But to see and actually feel on her very own body how they unfolded to her left and right as far as the alicorn's entire body was up to the tip of its horn...it was simply a feeling that could not be described.
She could now also see the alicorn's entire cutie mark clearly, as her wings no longer half obscured it. The impressively radiant large pink star in the center pulsed almost visibly with a profound arcane power underneath. The five smaller white stars around it also had a power of her own. Yet it wasn´t by far as strong as the main star of the alicorn´s cutie mark. Solely her power and magic to command...or at least the power of an alicorn her's to channel till the spell wore off and she returned to her old, far more boring and unimpressive, human body.
Already she was beginning to regret it somewhat, and she took it upon herself to ask Princess Twilight later. There had to be other ways she could experience the feeling of a pony's body a second time. A transformation spell of her body into that of a pony's perhaps? Or swapping with one of the alicorn's other friends? There were so many individual possibilities one could think of.
Twilight glanced below her wings and down toward the flat abdomen of her temporary alicorn body. Princess Twilight was a lot slimmer than she was used to from horses on Earth, yet retained a stockiness that proved the alicorn was not to be messed with in any case.
But now she wanted to experience this feeling of "weightlessness" again and she also had always wanted to rear up like a horse on its rear legs anyway. It looked both entertaining and impressive – especially with her alicorn body - Twilight was sure it would. So what better time was there for her to do it than now? Now that she literally commanded the whole body - well 85% - of a godlike alicorn mare below her torso.
She unfolded both of her alicorn wings all the way to their ends until they began to tremble with strain and with a single powerful thrust of her equine front hooves, threw herself off the ground and into the air. There she balanced a bit around with her new increased weight of grand alicorn body back and forth until she managed a bipedal stance on them relatively easily thanks to her outstretched alicorn wings.
It was impressive how useful wings were really. Although her lower body was now essentially that of a quadruped and therefore biologically designed to walk on all four hooves, she could still keep herself in the air on just her two powerful equine rear legs without too much effort. She thought about it - Hmm, that might be because she, as an alicorn-human-hybrid, also now had the native magic of a pegasus.
Twilight continued to maintain herself in the air on her rear hooves for a few more seconds, enjoying the sensations and impressions of her animalistic form coming at her from everywhere. She also kicked her front hooves up in the air in front of her several times. Just as she had seen horses do on Earth many times as well, as they reared up on their rear legs.
It felt as good and was as funny as it looked.
The sensation of feeling her very strong equine muscles under her soft lavender coat tense slightly in her hindquarters and rear legs to hold her alicorn body exactly where she was, was absolutely gigantic. She could feel how powerful her new equine body under her really was in every single detail, and it wasn't just because she was controlling the divine body of an alicorn - equines possessed quite powerful physiques in general.
As she continued to scan her body with her eyes, she also let herself fall back onto her front hooves from her rearing position. She didn't get much further with her investigation of the alicorn's body - her temporary body - however, for she suddenly felt a spreading warmth creeping up to her head from her alicorn's lower genital regions. With a soft moan of pleasure on her part, she suddenly noticed a newfound increasing wetness in her equine crotch and felt a second later something in the same area powerfully shift outward and then rebound. A soft and moist squelch rang out through the throne room with it.
Immediately after, she felt the wetness begin to slowly run down her alicorn buttocks and thighs, wetting them. Human Twilight wasn't dumb by any means and so she easily knew what had just happened with her alicorn form and in between her mare haunches.
"Of course. What else," Twilight whined in her mind. "Of course I'm asking to fuse bodies with Princess Twilight at the exact time she's in the middle of estrus season like all adult mares in spring.
As she formed said thought, she felt her borrowed marehood back at her alicorn rear continue to part in slow winks and spread more of her sticky vaginal fluids across her entire wide equine posterior. The powerful, yet pleasurable winks of her animalistic pussy almost like a sign to confirm her latest statement was true. It was really weird for Twilight to feel something so sensitive and alien like her new marehood shift on her body without her explicit doing and control. Feeling something so thick and swollen shift between her butt cheeks in arousal that she hadn't had a quarter of an hour ago. All while knowing it was the beautiful and perfect large tear-drop shaped literal pussy of Princess Twilight's alicorn physique. She could also now detect a slight, steadily increasing scent of something both very sweet and fragrant coming from the large hindquarters of her equine body. Wafting up from under her long, flowing tail that slowly began to raise itself behind her up in the air without her giving consent.
She quickly narrowed it all down as the strong personal feminine scent of Princess Twilight's intoxicating alicorn mare secretions now increasingly emanating from her engorged, hot and soggy alicorn marehood to attract willing stallions. There were none of those here, but the basic female animal biology of the alicorn at her rear she now also owned beside her human one didn't really care about that.
Although...wait a minute. For the next 55 minutes and 26 seconds, this mighty alicorn body was hers alone to command and thus it was also her own drenched mare sex in her genital area. If she wanted, she could explore her new primary equine reproductive organ to her heart's desire. She would only need some parchment and ink to write down all that she had learned of having an equine's sex lodged right between her haunches. With a quick glance she even saw a few unused rolls of parchment on the crystal map table next to the one inscribed roll of things Twilight had written down in a minute while explaining the partial body swapping process to her. A small list of 481 individual things the alicorn suggested Twilight could try while in full control of her alicorn body.
Twilight was about to head for the crystal table, but stopped herself with a sly smirk. She just had to take a decent peek at her winking mare slit first, no matter what others would make of it. With a single flare of her horn, she conjured the mirror back to her human side. She then shifted it along her equine body and positioned it directly straight behind her large alicorn backside.
Concentrating to find the required muscles and nerves in her animalistic lower body Twilight slowly moved her long tail to the side and revealed her equine crotch fully to the mirror. Twilight briefly simply admired the raw sight that presented itself to her from now seeing her temporary alicorn crotch laid bare before her eyes. She had had once an accidental peak at the alicorn´s large and tight horse pussy about two weeks ago and could say it was very magnificent. Yet she had always restrained herself from looking under the alicorn´s tail directly.
Just like on her planet earth it wasn´t very nice to peak at someone others crotch and genitals at random, but this here...was her own equine genital…at least for a bit less than an hour. Even if it was the one of a horse – a simple animal on Earth - here on Equus ponies were the supreme race, just like Humans were on Earth. Both were such basically the same. She saw nothing wrong with looking and studding at something that was more than common in this magical land.
Still even with this thoughts in her mind and the fact she had assured herself, it was something completely different to actually see it apparent on her own body. Or the lower portion of her body that was now for the time being entirely equine-like and normally would belong to the alicorn princess of this world she shared a name with.
There it was! Princess Twilight's gigantic dark equine marehood in all its beauty and glory, right between her plump buttocks, glistening with visible moisture and slowly winking a bit of it's rich pink inner walls towards the mirror. She concentrated again onto her equine half and after some trying managed flexing her tight vaginal muscles. Breathlessly watching and intensively feeling as princess Twilight's puffy labia split apart and her secretion covered big clitoris become slightly visible on each occasion. Twilight kept repeating the process of winking her alicorn pussy, smirking and lightly moaning from pleasure each time, that she did. She would latter examine this tight mare slit more in better detail, but right now? She just enjoyed the feelings and sight of what she was doing.
In the back of her mind Twilight knew she shouldn't be doing this, looking at and feeling the alicorn princesses marehood like this. It wasn't her personal body and she only temporary possessed and borrowed the alicorn princess' physical form with all save and naughty pony features it had. But her mind was simply to mesmerized by the deep-lavender and moist marehood winking between the alicorn's ass cheeks and presented to her. She continued moving her rear legs up and down, shifting her shapely equine hips, feeling her animal pussy move too and change shape a bit as she watched further over her alicorn body into the mirror.
With another careful flex of her hips, her dark-lavender marehood opened again as wide as it physically could and now revealed all of the rich pink interior of the alicorn's birth canal behind. As her pussy lips fell back Twilight made a mental note that later today she would explore every little nook and cranny of her mare sex to her heart's content without reprisal. For after all, until the spell wore off it was still her own equine snatch in her alicorn crotch.
Twilight carefully grabbed both swollen leathery sides of her labia with her magic and gently tugged them wider apart. She moaned in delight as her equine folds split open wider down the middle.
Her neck tensed as Twilight leaned further back over her alicorn torso and tried to get a closer look in the mirror at her marehood. Her eyes could clearly see the tight entrance to her animal pussy at the lower end. Her mind was still somewhat struggling with the absurdity of its mental pronouns. It was her marehood for now, clearly and undeniably hers. She nudged the entrance between her lower lips a little deeper with her magic. To that a spike of intense pleasure shot through her entire alicorn body up her human half and into her head. Her mare slit also winked and trickled a few drops of her mare honey out and down as response.
The opening to her vagina looked so small in the mirror; she didn't know how a stallion's entire cock was supposed to fit inside her equine cleft even if she knew it easily would. At least if she assumed that the average stallion mounting her to thrust his entire length into her moist folds was about as well-endowed as the horses on Earth. A crazy thought to grasp as a human really. But that very thought, which was now beginning to buzz around in her head, made her lust and heat climb even higher. So high in fact her grasp on Princess Twilight´s magic cut off as she wasn´t familiar with the concept of casting magic - her native knowledge gifted by alicorn Twilight back or forth. Twilight's ears then almost instantly twitched as she heard a soft squelch from her lower lips as they closed and parted and squeezed out some of her juices.
Of course, Twilight wouldn't be tempted to let herself be mounted by a foreign stallion for the next little under an hour. On the one hand, that would destroy Princess Twilight's good reputation as a monarch for sure. And on the other. Her current physique as an almost full body alicorn with its head and neck replaced by the torso of a human. Yeah that was just a little too peculiar to show off in front of the castle anyway.
She would also have liked to extend one of her hand to spread her smooth warm folds and feel how their moist texture felt against her human skin. But her alicorn body was just way too big for that. She would never manage to bend herself far enough to reach her marehood. So she lowered her tail back over her damp pussy and proceeded to go back to getting the supplies she had intended to fetch a minute ago.
Twilight began to move with slow trots to the crystal table in the middle of the throne room. However, as she moved, her moist equine labia proceeded rubbing against each other, which only made her more desperate and caused her marehood to expel more of the sticky and translucent mare honey in faster squirming.
On the other hand - or hoof as she now had also four of those - she felt something else just barely behind her mammary glands moving between her legs and brushing against the inside of her thighs with each step of her back legs. Looking down between her front legs in confusion, she saw something she had never noticed before about Princess Twilight. Probably hidden until now by a very powerful spell of the alicorn mare.
She spotted something... unusual for somepony of Twilight's sex to have, but she knew to know not all - far from it even - that there was of being a full-fledged alicorn.
Twilight looked down between her own tall mare legs, seeing the outline of a flaccid member beginning to grow erect from her dark purple, spottled sheath... ready to breed. Below, she could see two beautifully churning orbs the same spottled shade. Two thick and meaty testicles of the alicorn mare whose body Twilight possessed at the moment. That sight only made her cheeks redder and her marehood even wetter than it already had been.
So alicorns apparently had both the female and male genitals of a mare and stallion - a 'hermaphodite' Twilight filed away in her mind. That's interesting, I'll have to ask Princess Twilight about that later, when the body-swapping spell has worn off. But back to the matter at issue.
She tried to ignore the sensations from her two sets of genitals and trotted on toward the crystal table. She praised herself in her mind that for having almost no experience with an equine's quadruped body and its functions, she did not make such a bad first impression.
Reaching the table and her body still somewhat under control, she activated her horn upon her forehead. Twilight used her intuitive knowledge gained through the connection to the alicorn's mighty body to pick up the scroll with Princess Twilight's suggestions. In addition, she grabbed for herself two blank rolls of parchment and a small jar of ink and quill.
As she turned away to begin the "research" of her new biology, she unrolled the written parchment scroll and skimmed the first few notes:
- Bucking (Caution: expect violent results due to immense alicorn strength).
- Levitaion (Go slow and easy and no pony's - that's rude)
- Transformation / Transmutation (Don't worry, alicorn magic is fail-safe)
- Potion brewing (obvious isn´t it?)
Potion brewing? Now that sounded like something she definitely needed to try. She had seen a cauldron and vials somewhere in Princess Twilight's castle here before....