Metamorphilia

Fluttershy pushed her die across the table and focused on her breathing. She was just flustered from the transformation, of course. And… and shy! Of course, she was a shy pony at heart, even around her friends. That was why her heart was pounding and her crotch was dripping and her wings were—

Oh right! She didn't have those anymore, so at least her shivering feathers wouldn't give her away.

Pinkie Pie scooped up the die and held it up on her hoof, peering at it every which way. “I hope I get… mmmm, this one!” She shook it between her two hooves—somehow—and moved to toss it.

“Pinkie!” Twilight said, her voice just a little dry. “You need to spin the bottle first!”

The pink mare pouted. “Does it really matter which one I do first?”

“It's in the rules.”

Pinkie Pie sighed. “I guess since it's a party rule.” She slumped down in her chair until her hind legs touched the edge of the table. She reached out with one leg toward the bottle.

Rainbow Dash blinked, eyes wide, at Pinkie's completely exposed pussy. This wasn't like catching a stray glimpse under somepony's tail at the market, or even like peeping on somepony when they thought they were alone. Pinkie knew they were all watching her. Rainbow's stomach tightened when she noticed the slight matting of the fur between Pinkie's legs, the prominence of her lips, the flesh that was flushed a deep, warm red in contrast to the lighter pink of her body.

Then Rainbow made the mistake of taking a deep breath in through her nose, and she nearly gagged. Not because the odour was unpleasant—aroused mare was one of Rainbow's favourites—but because it was so sudden, so thick, and coming at her from seemingly every direction. As she traced her eyes across each of her friends in turn, she picked out the most likely subjects.

Rarity, obviously, whose facial muscles were twitching involuntarily, who sat with unnatural stillness on her chair, whose newly defined muscles stood out under her pelt as if they were straining to keep her airborne. Beside her, Fluttershy was almost as pink as Pinkie Pie and twice as twitchy. Her hindlegs were folded perfectly underneath her at just the right angle to keep her rear off the chair.

And… Rainbow glanced between Twilight, Applejack, and Pinkie Pie, trying to place the third vector of the intoxicating feminine musk that permeated the room. They seemed relaxed, considering the circumstances. None of them were breathless or antsy.

Then, with sinking horror, Rainbow chanced a look down at herself and breathed in. Oh Celestia, she stank as bad as if she was in heat!

Clink went Pinkie's hoof against the bottle, and Rainbow Dash jerked her gaze back to the table, where the bottle spun in a blazing fast circle. After a few moments it began to slow, and panic gripped Rainbow's heart as the tip rolled closer and closer to her, until…

It slid past her and pointed to Twilight Sparkle.

Applejack chuckled. “Well shoot! I don't reckon I'll ever get to play.”

“It'll be your turn soon,” Twilight said, rolling her eyes. “Rarity? Magical die, please?” Rarity leviated it over wordlessly and set it down in front of Twilight. The alicorn picked it up, then looked to her partner. “On three?”

Pinkie Pie nodded. “Three!” And she threw her die.

It hit the table and slid almost to the center, then stopped dead. Not a single bounce or roll or skip. The mare threw a hoof into the air. “Woohoo! It's the one I wanted!” Then she shook all over, from her ears to her tail to the tips of her hooves. She rolled onto her stomach, finally hiding her delicates from view. “W-whoa, this is… this is…” She stood up on her chair, then tumbled down to the ground beside it, her hooves kicking and her back arching.

Twilight jumped to her hooves, forgetting all about her own die, and hurried over. “Are you okay? Is it too scary? I can stop it, if—”

Pinkie threw her hooves up in protest and, through a fit of giggles, said, “Nonono! No! Haha, pfft, hihi, oh!” She rolled over again, hooves clutching her sides, then her hips. Her hind hooves found purchase and she managed to pull herself into a vibrating pink ball.

Slowly, so slowly that Twilight almost didn't notice, Pinkie Pie's giggles dropped in pitch, until she sounded like a bubbly, jovial young stallion who had perhaps imbibed a bit too much. And, when Pinkie finally untucked her head and rose to her hooves, she and Twilight met eyes and found themselves at almost the same height.

Pinkie Pie looked down at her chest and forelegs and cocked her head. Her tail, mostly unchanged, swished behind her. “I feel… kinda funny.”

Applejack cleared her throat. “Sugarcube… ya look like a stallion.”

And she did. Pinkie Pie stood almost a head taller than before. Her jaw was more prominent, her face less rounded, her neck a bit thicker and her chest a bit thinner. And perhaps the most profound change…

Pinkie Pie dropped back onto her haunches, leaned backward, and peered down at her groin. She was treated to the same visual feast that her friends were enjoying.

In place of Pinkie's usual pair of small, nearly invisible teats and her similarly discreet pink pussy was a pair of heavy, hanging balls that moments ago would have looked disproportionately massive on Pinkie's frame. Just above those orbs was a fold of skin that was only really noticeable if one was looking for it. A sheath, concealing the elephant in the room.

Everypony at the table was certainly looking for it, for various reasons. Well, two reasons.

Shock, or awe, or a mix of the two.

Twilight took a step back. “Uhhhhh… Pinkie?”

“Mhm?” the mare hummed. It was a little strange to hear a masculine voice speaking in Pinkie's exact cadence and inflection. Like a funhouse mirror version of her voice, although not at all warped or cartoony. “This is so fun! Did you roll yet, Twi?”

“Seriously?” said Rainbow. “We're still doing this? Pinkie Pie's a colt.”

“No I'm not!” Pinkie said. She gestured to her head. “Still all mare up here! I've just got some different parts.”

“I know, I know. Just… what are we getting into?” Rainbow muttered.

Pinkie Pie smiled. “It's okay if you don't want to play anymore, Dashie, but I think this is fun! When else am I going to have the chance to talk… way… down… here?” Pinkie lowered her voice with each word until it hummed at a delightful baritone.

Rainbow Dash huffed and retorted, “I'm not backing out or anything. Just checking if any of you wimps were out of your depth.”

“Sure, Dash,” Applejack said with a chuckle.

Twilight shook herself. If Pinkie Pie wasn't freaking out, neither would she. She marched back to her chair, sat down, and picked up her die.

Roll the die, Twilight, she commanded herself. Thoughts of what could happen flashed through her mind. She could turn into an old mare, or a piece of wood, or her brother! This was Discord. Anything was possible. But when she ran the last few minutes back in her mind… Fluttershy sitting snugly in her deer form; Rarity posing in front of the mirror, squirming as Fluttershy's hooves massaged her new muscles; Pinkie Pie giggling and enjoying the transformation.

Twilight tossed the die.

She felt the magic take hold of her instantly, weaving through her body and reshaping it with the sort of incoherent ease that characterized Discord's spells. Most other magic she could follow, understand, even tweak after it was cast in some cases, but the die's payload was as baffling as the ancient magic that suffused the ground and air of Equestria.

She shivered as her limbs shrank, her coat thickened. Her wings prickled at the roots of her feathers, and she couldn't help but rustle her wings in response. She waited for her features to change, for the ground to drop out beneath her, something.

A few seconds later, the tingling magic faded, and Twilight opened her eyes.

“Huh.” She looked down at her die. It was the same sigil that Fluttershy had rolled earlier. A species change, presumably. Twilight peered at her legs, her chest, and over her shoulder at her wings and back. Seemingly no change at all.

Rainbow started laughing, and Twilight looked up at her friends. Most seemed to be some level of horrified, hooves over mouths and eyes bugging out wide.

“Twilight! Your… your—”

“Hah!” laughed Rainbow, hopping up onto the table and trotting up to Twilight. She tapped her on the skull, right in the middle of Twilight's forehead. “Oh wow, you look good as a pegasus, Twi!”

Pegasus. Forehead. Twilight raised a hoof and ran it over her skull with growing panic. Her horn was gone. She was shorter, and… oh Celestia, she was a pegasus pony!

“Twilight!” Rarity said, her voice tinged with horror, her attention finally pulled away from the burning need between her thighs. “Y-your magic, darling. Your princesshood!”

Twilight scowled, a look of concentration on her face. “Huh. Actually, I think… I can still feel it.”

“It?” asked Applejack.

“My magic. It's…” Twilight stuck out her tongue and peered off into the middle distance. The bottle they'd been spinning suddenly floated into the air, surrounded by a soft magenta glow. “I guess the transformation is pretty surface level.”

Good thing, too. Changing an individual's magic was not much different from changing their soul, their identity. Some careful alterations were possible, of course, otherwise alicorn ascendance would be a monstrous event, but something as dramatic as ripping her unicorn powers from her would be tantamount to… well, as bad as stripping her friends of their truest aspects and rendering them shells of their normal selves.

Twilight gulped and floated the bottle up and down a few times to reassure herself.

“I'm just shorter,” Twilight said, trying to calm the others. She looked up to where her horn had been moments ago. “A lot shorter.”

The sight of Twilight using her magic like normal set the room at ease.

Pinkie Pie cleared her throat, and the deep timbre drew everypony's attention. “Card time!” she announced. When nopony stopped her, she reached out and completely overshot the deck of cards. “Whoops!” she said, and clumsily lurched upright. She squinted at the table, then at her outstretched foreleg, then carefully lined the two up. She flipped over a card. A smile spread over her face.

“The other player has to sit on your lap until their next turn.” She turned to Twilight and raised her eyebrows. “That's okay, right?”

Twilight felt the eyes of the entire room on her. She nodded. “O-of course it is!” She hopped to her hooves and lurched slightly. Oh ponyfeathers, she was almost exactly the same size as she was before her ascension, but it still felt like she barely knew how to walk. She carefully made her way over to Pinkie Pie. “Umm…” She'd never sat in somepony's lap before. It wasn't a natural position for quadrupeds.

Pinkie Pie slumped back a bit in her chair and held out her forelegs. “Hop up!” she invited. “You're a pegasus now, right? Pegasi are lighter than clouds.”

“We're actually not!” Rainbow offered helpfully.

Twilight took a breath, then gathered her weight and hopped into the air, flapped her wings twice, and set down on top of Pinkie, her legs draped on either side of the earth pony's torso. Their faces were inches apart.

“Do you want to turn around?” Pinkie asked in Twilight's ear. Her voice drew goosebumps all down Twilight's body, and she wasn't certain whether she disliked it or not. “Everypony else is still playing.”

Twilight swallowed hard, then, with Pinkie Pie's help, swung herself around so her back was pressed against Pinkie's barrel. As she settled into her new position, she became suddenly, acutely aware of just how her rump lay against her friend's lower belly. Twilight only had to look down between her own legs to see Pinkie's new equipment, which was thankfully still sheathed.

“Okay, um… You're up next, Rarity.”

The coltish mare blinked. “Ah, again? Wasn't it my turn mere moments ago?” And Rarity was just starting to feel normal again. More normal, at least. She still looked more like an athlete than a fashion icon, and she could tell that even standing up and trotting around the room would provide enough stimulation to steal her composure away again. But so long as she held very still and took deep breaths, she could escape the table without dribbling on the castle floor.

Twilight nodded, doing her very best to look collected from her perch on top of Pinkie's soft, broad hips. “You were Fluttershy's partner last time, on her turn. Now it's your turn properly.”

“That means no getting out of it,” Rainbow said with a smirk.

“You can always pass,” Twilight said, looking sternly at Rainbow. “We wouldn't want anypony to feel uncomfortable.”

Uncomfortable. Twilight grit her back teeth. Somehow, Pinkie was all too comfortable. It was like sitting on a warm beanbag chair. A beanbag chair that shifted and breathed, twitched and stretched minutely. A beanbag chair with strong, subtle muscles that provided the perfect amount of resistance beneath Pinkie's pudge.

This was nice, she thought. Ponies should sit on each other's laps more often. Without even really thinking she leaned forward and planted her forelegs on the table to balance herself a bit, rotating her hips against Pinkie's in the process. The soft fur slid against her marehood all at once, and Twilight almost gasped aloud, her hindlegs kicking slightly to either side of her seat-mate as little prickles of pleasure snaked up her spine.

“Everything okay, Twi?” asked Pinkie.

Twilight swallowed and tried to readjust herself again, lifting herself up slightly and shifting forward until her nethers were clear of the other mare's body and she was once again resting solely on her rump. “All good,” she croaked. She took a quick sip of her cider. She shifted again and winced at the slight damp spot she felt on Pinkie's coat. Just two more rounds, she thought desperately.

Across the table, Rarity muttered quietly as she levitated a die and the empty cider bottle over. Rainbow Dash whispered something to Fluttershy. Applejack let out a little hum. Sure enough, the game was continuing on.

Then Twilight felt something. A new, electrifying, burning point of contact between her and Pinkie. Twilight took stock of where she was positioned, how her body was splayed against her friend's, and a flash of terror rolled through her. As subtly as she could, Twilight peered down between her forelegs at her own crotch.

And at Pinkie's crotch, which had gotten decidedly less subtle and was getting less and less so by the second.

Poking out of the sheath by mere inches was the rapidly thickening head of Pinkie Pie's brand new equipment. It was just a bit darker than her coat, but to Twilight it stood out like a lighthouse from the sea. Pinkie took a breath, and her cock twitched, growing another quarter inch, dragging across Twilight's lower lips ever so slightly.

Twilight Sparkle lifted her gaze and looked straight ahead. It wasn't Pinkie's fault. The tension in the room was already thick, to say nothing of the scent of aroused mares. If Twilight were in Pinkie Pie's position, she'd probably be at full mast already. Probably.

She didn't exactly have any experience in that department. Yet. The night was still young.

So, instead of freaking out, instead of jumping to her hooves and calling the night to a close, she angled her upper body and forehooves to hide their point of contact from view as much as possible and tried to act casual. No need to embarrass anypony. Pinkie would calm down, or the spell would wear off, or some other thing would save them from having to confront the situation. Until then—

She felt a hot, hard sensation against her lower stomach, but the burning rod by her pussy hadn't gone anywhere. She chanced another look down to see Pinkie's cock had grown long enough for the head to settle between Twilight's teats, the tip nearly thick enough to stretch between them. A shudder ran through Twilight's body, and the motion of her marehood against Pinkie's length was enough to send a fresh wave of sparks through her, and a fresh trickle of juices from her pussy.

Pinkie Pie leaned forward, lips inches from Twilight's ear. “Do you want to get off?” she asked in her low, skin-prickling voice.

Twilight bit her lip and tried to focus on what Pinkie Pie surely meant. Did she want to get off of her lap and go back to her chair, to cling to normalcy while there was still some of it left in the room?

“It's fine,” she whispered back. “Nopony's paying attention anyway. We're just two friends cuddling.”

Pinkie giggled. She flexed her hips slightly, sliding her cock along Twilight's slit. “I know that, silly, but I think stallions are usually supposed to take a trip to the colt's room when they get like this.”

“Yeah, but…” Twilight floundered for a decent excuse, then settled on a paltry, “You're not a stallion though.” Her core tightened, and she dropped her weight, pressing her crotch against Pinkie's cock just a bit harder. She could feel the medial ring now, grinding against her pussy. It was a good thing that her tail was pinned between her ass and Pinkie's lower belly, or it would surely be whipping through the air.

“Ahem!” Rarity cleared her throat forcefully. “If you two are quite finished, it is my turn, as we've all agreed.”

Twilight's heart skipped a beat, and she jerked her gaze over to Rarity, but she wasn't looked at either of them, but instead was glaring at Rainbow and Applejack, both of whom had little amused grins on their faces. Twilight let out a breath of relief. She'd clearly missed something, but so long as nopony was paying her any attention…

“I don't suppose tossing this die again will reverse the changes from last time?” Rarity wondered. “Discord may be a harmless prankster now, but I'm not eager to have two of his spells on me at once.”

Applejack grinned. “Can't really know until you throw the die, now can we?”

Rarity sighed. “I suppose we can't.”

She picked up the die.