"Buy vocatio alica, ut nemo molestus ut videre..."

The witches chanted over a magical circle, illuminated only by dim candlelight and the glow of the runes inscribed on the floor. The glow of the circle brightened, and the two witches clad in black intensified their chant, hoping to bring forth a portal to another realm, and steal its power. They repeated their chant as it grew brighter and brighter, and eventually their efforts bore fruit; tentacles began to crawl out of the hole they had created in the middle of the circle, slimy appendages that pulled themselves up onto the solid ground of the outer rim of the circle. The creature that emerged had an indistinct form, difficult to describe. Its most distinct features were its many long tentacles, and a central mass that may or may not have hosted the creature's central functions and consciousness.

A second similar creature soon followed, and as soon as it fully emerged the witches stopped chanting, the glow rapidly fading. They waited with bated breath as the portal smoothly closed, leaving only the two squirming creatures behind, each no larger than a cat, although it was difficult to guess their total size without compressing all of the tentacles together.

The two witches exhaled in relief that their spell seemed to have been successful, and once the spell faded fully, they turned to each other and cried in celebration, hugging each other in elation.

"We did it! It actually worked!" The raven-haired one exclaimed, giggling with glee. "In your face, everybody!"

"What do you call those things anyway?" The one with the long brown hair asked, releasing her grip on her partner. The two were quite young, barely more than twenty years of age, and were quite pleased with themselves over the success of the spell that other, more experienced witches had told them they weren't experienced enough to handle yet.

"No idea." The black-haired one said, wrinkling her nose at the sight of them. "They're all gross and slimy, no need for more than that."

"So how are we going to get them to give us their power?" The brown-haired one said. "There's no way I'm touching something disgusting like that."

"I dunno. My book didn't really say, I figured I'd find out once we actually got these things." The raven-haired one said, having far less sense than her refined features suggested.

"Uh, what do you mean you don't know? You said you knew everything about this!" the brunette said, turning sharply to face her friend. "I wouldn't have summoned these if you said that before!"

"That's why I didn't say it, you wouldn't have helped!" The black-haired witch said, to her friend's dismay. "The point is, we have them now, and they can't get out of your circle, so we have all the time in the world to figure it out."

"I guess." The brunette said, not sounding very confident. "We'll just-"

Without warning a tentacle shot out over the circle, slapping the slimy tentril onto the exposed ankle under the brunette's black dress. She shrieked, slipping and falling to the floor, kicking desperately to try to dislodge it.

"Get it off me! Get it off!" She wailed as its grip tightened, the raven-haired witch stamping on it unsuccessfully. She backed up fearfully as the two unnamed creatures oozed out over what was supposed to be an inpenetrable shield.

"You told me the circle wouldn't let them out!" She shouted, unsure of whether to flee or help her friend.

"I did! I thought I did! Help me!" The brunette cried, but before her partner could help her the short-haired young woman was taken off guard by one of the creature suddenly leaping with surprising force, hitting her square in the chest and bringing her tumbling down. She screamed as it wrapped around her, binding her arms and leaving her helpless to do more than roll on the floor.

"Help me, Ma-" she cried out helplessly before one of the slimy tentacles flickered out towards her face and forced itself into her mouth, the girl gagging as it travelled down her throat and muffled any sounds she tried to make. The tentacles squirmed around her body, squeezing her small breasts as it seemed to be searching for something, unsatisfied by the orifice it had found.

"Lily!" The brunette screamed as she looked at her friend who was moaning in a combination of pain and pleasure as it molested her body, the tendrils slipping inside of her dress and sliding across every square inch of her, making its way downward.

Meanwhile the brunette's creature that she was unsuccessfully trying to pull off of her was making its way up her thighs, the brunette moaning as it reached the folds of her pussy, the tentacles inquisitively pulling down the panties that covered it. Before she had time to realise what it was about to do, the tentacle invaded the newfound hole, and the brunette gave a gutteral moan at the sheer pleasure. Seemingly satisfied with the place it had found, it pushed the entirety of the tentacle in, another tendril following, and then another, abandoning her legs as the central mass stretched her pussy wide enough to force itself in. Her abdomen began to visibly distend as the creature forced more and more of itself into her womb, rapidly bloating outwards inch by inch. Eventually the final tentacle withdrew into its new home, and the brunette's belly had been distended until she looked like she was carrying a pregnancy to full term.

The brunette stared at her enormous belly in horror, about to scream one more time before the sound died on her lips, everything suddenly going faint. The witch collapsed, making no more sound as her eyes closed and she lay limp on the floor. Meanwhile, the other creature seemed to notice what its companion had been doing and followed suit, the gagged girl making the basest of noises as she watched her own gut grow until she was similarly bloated, free from the creature's grip to cradle it with horror. The last tentacle, still in her mouth, finally pulled itself free, the girl coughing and gasping as it followed the rest. She tried to stagger to her feet, but before she could push herself up all of the strength left her body, and even terror left her as her consciousness faded.

The two bloated young women lay motionless on the ground for a minute, completely still and silent. Then, without making a sound, the two started to move. They only twitched at first, but then seemed to regain control of their bodies and slowly pulled themselves to their feet. The raven-haired one took the time to pull up the panties that were pulled halfway down her legs, while her partner let hers slide to the floor without a care. The two looked down at their bodies, one moving her arms experimentally, THey did this in silence for a minute before one of them opened and closed her mouth a few times, as if to get used to the motion, and then spoke.

"What foolish humans." She said, her voice full of mirth and in a more refined tone than the airheaded one it had been a mere few minutes earlier.

"Indeed." The brunette said, her worried tone replaced with one of pure confidence. "They were so ill-prepared for us that it was laughable."

"Their summoning was so full of holes I'm amazed we were able to come forth, but I suppose they were confident enough for that. This one planned to keep us in a fishtank, of all places!" The raven haired one said with a laugh, repeating the sound a few times. She liked this sound, but the more she repeated it the more foolish it began to sound, and so she stopped.

At this point, had there been any observers in the room, it would have been obvious what had happened. The witches were no longer in control of their bodies, now merely the hosts to the alien creatures who had seized the opportunity to take a more defined and versatile form in this world. The consciousnesses of the hosts was not erased, merely in a deep slumber where it would be used for its valuable resource of memories. Perhaps they would even one day regain control of their bodies, if the creatures tired of them or found a more attractive body.

"What shall we call ourselves?" The raven-haired one asked. "I've never had a name before, nor a need for one, but it seems appropriate now."

"A body does need a name, I suppose." The brunette agreed. She combed her host's memories, a useful thing that had provided all of the basic motor control of her body, plus language and basic living functions. More personal memories required more concentration however, but it took only a moment to pluck out the host's name.

"I shall use Mary, the name of this woman." it declared, elliciting a raised eyebrow from its partner.

"Quite a plain name for ones such as ourself." It noted, but its partner would not be discouraged.

"We have taken everything from them, why not their names?" It suggested. "We will have to use them if we encounter any of their companions anyway. Besides I like the sound of it, so simple to say."

"Then I suppose I shall do the same." The raven-haired one said with another laugh. There was humour to be found in a being such as itself using the feminine human name of Lily, after all.

The newly-christened Lily inspected her body, aware that her mind was starting to adapt to that of her host's, taking on its human values. She began to grow slightly annoyed at the slimy garment she was wearing, a plain black dress. It seemed that humans took a disliking to being slimy, which she was slightly offended by but was now starting to see why. She was experiencing all of the new sensations that a human body had to offer, but not all of them were entirely pleasant. She looked at the pregnant-looking bulge that was her belly, poking it curiously. It was slightly odd to think of her true body being inside this gravid orb, after all.

"It is a shame that this is the best way to occupy this body." Mary said out loud to her partner, cradling her belly. "Humans seem to find this roundness unusual, and prefer thinness."

"Only some of them." Lily said, enjoying the extra curve to her body. "And as the appearance of one carrying human spawn, it offers natural advantages."

"True." Mary said. She looked around the small room, used only to contain the summoning circle. Her memories told her that there was a comfortable house surrounding it, hidden away in the woods. Witches were not so fondly regarded by normal human society, it seemed. She also noted that it belonged to Lily, not her, and she seemed to have one of her own elsewhere. She was eager to have an abode of her own, and decided to leave her partner.

"I think I shall retire to this woman's home." Mary announced. "I have much to grow used to."

"Are you sure you will no have no trouble reaching it?" Lily asked, always the cautious one of the two.

"This body is an efficient channel for magic, even though this woman has little of it herself." Mary said confidently. "Her ambitions to use us to increase her own powers were short-sighted, but it will work for us as they had hoped. We are stronger than the common human mage, I doubt anything will stand in my way."

Lily made no other effort to stop her companion, knowing that Mary had always been impulsive. The brunette host left, leaving Lily to explore her host's house, and her new body. But the slimy sensation of the dress on her skin was annoying her, so she stripped, wearing only her panties and slippers, which she removed as well, figuring there was little sense in being only mostly undressed. The humans seemed to have reservations about nudity, but she saw little issue with it herself and wandered through the small house in search of a mirror.

Lily sized her body up in the mirror she found in her host's bedroom, allowing her host's human values to influence her opinion of it. If she attempted to keep her mind the same as the creature residing in her body's womb, there would be little point in taking over the body in the first place. She started with the face, which was quite important for humans, and she was quite pleased with it. Sharp, refined features, with thin lips that gave her a dignified air that the airheaded girl who previously controlled the body certainly didn't deserve. She had short, straight hair, which Lily disagreed with. She compared it with the images of women with longer hair, and decided that she wanted it longer. She would have to grow it out, perhaps use magic to speed up the growth.

Next was her body. Lily was far less satisfied with this one. Her host had small, pert breasts, not even enough to cup in her hands. She had narrow hips and a flat ass, and Lily experienced her first frown at this. It was not right that her belly was so round, and the rest of her was so straight. If her belly was flat like the rest of her then she might have tolerated it, but she was deeply unsatisfied with the state of it right now. It should be round, smooth, soft, with large breasts, broad hips, and a rear that matched. Only then would her belly seem less out of place, and considering it was technically the most important part of her body, matching it took priority.

Lily already envisoned how to fix this, using magic to use the body's hormones to make it slowly grow. It would take time, but she had all the time in the world now. She placed her hands over her breasts, envisoning the heaving bosom that she desired. In passing she rubbed her nipples, and gasped at the sensation it created. She rubbed it again, creating a stronger response. This required experimentation, she decided. She pinched the nipples, tweaking them to draw out the strongest sensation. Rubbing her breasts helped too, and Lily was starting to feel rather hot and worked up. One of her hands instinctively snaked lower, tracing the slope of her belly until it reached the underside and tenderly poked at her senstive clit. This provoked the strongest reaction at all, and Lily flushed red with arousal. The last thought she had before she attacked her tender pussy was that this new body was turning out to be an even better idea than she expected...