Author's Note

THE FOLLOWING STORY CONTAINS: SLIME INFLATION, POSSESSION, BRAIN SEX, BREAST AND BUTT EXPANSION. ENJOY!

Day 1: Rainbow Dash

Rainbow Dash was excited. When it came to thrill seeking, nothing came close to the thrill of haunted trails and competing in a contest of speed. Combining the two would no doubt be an unforgettable experience, and it was during her research for an assignment that she found a large book hidden in the back of the library. Dark leather with gold metallic lettering reminiscent of old fantasy texts, it simply read:

TOME OF TANTABUS

Tales of Canterlot’s Many Mysteries

At first, she didn’t really get it, but flipping to a random page brought her to an old legend in the town, one that she’d never even heard of: The Speedy Slime Specter. Apparently, a young woman who lived here was the fastest skater the town had ever seen. No one could beat her in terms of speed, earning jealousy from the other skaters. Many attributed her speed to the board, custom-made by her. In an act of sabotage, they applied a slippery substance before her next race, and before the young woman realized it, she was flying into a giant pool of slime left by the saboteurs.

They initially laughed in victory at humiliating their nemesis, but then something was wrong: She wasn’t surfacing. When they looked into the tub, they found that… She was missing. The best racer ever had just vanished in slime. Since that day, a rumor had spread that if one were to go to the highest hill of Canterlot at midnight and declare themselves the fastest racer, the Speedy Slime Specter would appear and challenge you to a race. Win, and receive her board. Lose, and they would possess a haunting fate…

That was what led Rainbow Dash skating up the tallest hill of Canterlot in the middle of the night, accompanied only by the sound of crickets, the quiet hum of the streetlights, and the dim glow of the moon. Of course, part of Dash’s mindset was from a bit of skepticism. No way could a slime ghost be real. That was reserved for 80’s horror comedies and weird fetish stories on the internet.

Soon, the street became darker as the street lights got more scarce, and soon, Rainbow found herself looking down the tall, barely lit hill while checking her watch under the glow of a single streetlight. Her heart beat quickly as she watched the seconds tick on. She was so glad no one was there to see her do what she was about to do. She smacked her own lips dry and took a deep breath.

Midnight.

“I, Rainbow Dash, am the fastest racer ever!!”

Then, silence.

Rainbow Dash waited for something, anything to happen. Nothing. Just a quiet breeze that blew past her as the rainbow-haired girl stood there with rosy cheeks in embarrassment. She huffed and looked away, hands in her hoodie. “Should’ve known that whole story was bogus…”

SMASH

Dash yelped and looked around, but no sign of anyone. A chill ran down her spine as she slowly set down her board and prepared to head back. Then, she looked back at the road she’d just taken to get here. One by one, the streetlights were going out, and the sound of skateboard wheels rolling was getting closer. Worse yet, they were sounding fast. In a panic, she turned around to try and go the other way before-

click.

Darkness. Darkness all around her. Not even the moon could illuminate the path, and unsure where she could go, Rainbow opted to freeze right then and there. The wheels stopped moving, but that only made it more frightening for her. Because they’d stopped right in front of her. When the light returned, Dash was face-to-face with a massive pile of teal slime that seemed to be molded in the shape of a young woman. She looked to be Dash’s age, if not a tad older, and her gaze toward Dash was one of pure malice.

“So, you wanna try and take my place, huh?” The specter spoke in a whispy, warbling tone.

“U-Uhhh, I mean…” Dash faltered as she began to back away, her confidence in the situation quickly draining. “I’m pretty fast, yeah. I was just-”

“What? You thought you could just summon me for a laugh? Ha!!” The slime girl rolled her… Eyes, or rather the indentations that resembled eyes, as she held up a board that looked absolutely pristine. “Figures you’d back out. You look like a girl who’d struggle to outrace a granny on a mobility scooter.”

“H-Hey!!” Dash huffed in an offended tone, turning back at the specter in frustration. “Don’t talk to me like that! I’m one of the fastest in town! No one can beat me!”

“One of the fastest, but there’s only room for one at the top,” the slime girl leaned in, a smug grin spread across her gooey face. “And if you’re not first, you’re last. So, do me a favor, Snail Fail, and get off my hill.”

“... Oh, that’s it.” Rainbow Dash dropped her skateboard down and pointed to the slime girl. “I don’t care if you’re a ghost, you’re not gonna beat me!”

“Heh, that’s more like it…” The slime girl dropped her board down and hopped on it. “And you know what? Just to be charitable, I’ll give you a 10-second head start. Go on, impress me.”

“Ha! You’ll regret that! I’ll be down this road in ten seconds flat~” As Dash looked down at the winding road lit by only a few lights, a feeling in the pit of her stomach caused her to second guess her decision. However, she quickly shook her head and got back in the zone. Her pride was at stake! She wasn’t about to be called a slow poke and anything but the best! With a quick breath to focus, she pushed herself down and began shredding downhill.

It was a street she was pretty familiar with when it came to racing, having done so in the past. This meant she had muscle memory down pat, making a hairpin turn that anyone less experienced would’ve botched in those conditions. She didn’t hesitate, staying as focused as she could as she leaned in to reduce drag. All she needed to do was put as much distance between her and the specter, then she could get out while she-

WHOOSH

Dash could barely comprehend what had just happened. One moment, she was making the second turn down the hill, the next, the slime girl had just darted past on her board, moving twice as fast as Rainbow could manage. Her eyes widened as she leaned in, trying her best to keep up with this slimy speed demon. You gotta be kidding! She thought as she tried her best to follow the path the ghost took to hide behind her and avoid the wind. I’m not gonna let out pass me up like this! I’m going to beat you, I prom-CRAP!!

In Dash’s own muscle memory, the third turn was a sharp one, but one that she could easily manage. She did it out of instinct. What she forgot to account was the small trail being left by her opponent, barely visible unless exposed to light. What happened was a sudden slipping as Rainbow was sent rocketing off the edge and sent flying, tumbling in the air. Crap crap! Gotta pony up!

She tried to muster her powers, but her mind was too discorded, launched in different directions. Between her failure to notice the slime, getting lapped when she had a lead, and her inability to stop herself from cascading into the air. All she could do was shut her eyes and brace for impact…

SPLORT

Her next sensation was the feeling of wet surrounding her. Not just wet, but a gooey feeling that made movement borderline impossible. Oh, crap. Did I end up in some gross pond scum?? She thought as she worriedly debated trying to open her eyes and risk blindness while holding her breath. It took all but the fear of asphyxiation to make an attempt at opening her eyes, and thankfully, she was able to without any pain or issues. However, it was what she saw that made her really panic and attempt to break her out of her entrapment.

Everything around her seemed to be in a warped, bubbly lens. It was almost like she was trapped in carbonated gelatin, but she knew exactly what it was from the smug expression that looked at her. She was trapped inside the Speedy Slime Specter herself.

“Ha! Look at that!” The slime ghost boasted as she poked at herself. “Trying to cheat by flying off the hill? A lotta losers tried that, and they ate dirt! Well, I guess you’re gonna eating slime from now on~”

Dash’s eyes widened as she noticed back at the face, and the specter simply pointed up. Looking through the slimy haze, Dash couldn’t believe what she was seeing: they were already at the bottom. She took that massive, high speed fall down the hill, and she still lost to the slime girl! Shame and humiliation caused her cheeks to heat up to the tune of the victor’s laughs, but then, she felt something try to push her mouth open. By instinct, she pushed her face away and the girl made a tutting sound.

“Now now, no need to be a sore loser~” she cooed mockingly. “You know the rules. You lose, and you’re mine~”

Rainbow’s eyes shot open in shock, earning another laugh for her trouble. “What? Did you think you could just summon me and not get punished for wasting my time~? Now come on and open up~!” When she saw that Rainbow still wasn’t complying, she let out a small sigh. “Fiiine, then…”

Oh, thank goodness… Rainbow Dash visibly relaxed.

“We don’t go through the mouth. There’s plenty of holes I could get through~”

W-Wait, where are y-OOOOOOOO~!

Before she could even consider the perverted potentials, Rainbow suddenly felt as two slimy tendrils pushed into both of her ears and dove right to the brain. Her pupils immediately darted to meet each other while her mouth was struggling to stay shut. Every second, she could feel her brain getting showered in this goo, seeping into every crevice and making her body twitch from these ~~heavenly~~ strange sensations.

However, the Specter wasn’t through with her yet. Slowly, she began to tear through her prisoner’s clothing, looking for any other points of entry. It didn’t take long for her to find two more holes between the legs, pushing upwards and forcing Rainbow’s legs to buckle as her stomach bulged out. Her mouth cracked open just a smidge before slamming shut, but that was enough for dollops of slime to slide down her throat. She got the taste of an ~~absolutely delicious~~ odd tasting energy drink, all while her pussy and ass were gradually getting filled. More and more, the slime slid in, and it gradually pushed her stomach out further and causing it to wobble as it grew.

However, this wasn’t the only place that the Specter found that interested her. As the slime tendrils groped across ~~Specter’s~~ Rainbow’s body, they began to prod at the small size of Rainbow’s tits. Even with how small they were, teasing the nipples alone was enough to make the poor girl let out muffled moans and whines. It was enough to make Specter giggle as she loomed overhead, slowly lifting those teasing tendrils… Before shoving them right in, pushing out slime at the same speed as the rest.

“A-AAAAHHHHH-MMMM~!”

Specter Dash couldn’t hold it back any further. Her mouth burst open to let out the mother of all moans, and in that split moment, a massive slimy tentacle pushed past her jaw and dumped down her throat over and over. Her eyes rolled up as the world became a blur. She could feel her grip and control of the world beginning to fade as more and more slime dumped into her, and her riding an orgasm that never seemed to end. Soon, the world began to get dark, and exhaustion finally took her, her holes still getting filled…

~~~

The rainbow haired girl would slowly come to a few hours later, lying on the empty abandoned road with her whole body feeling ~~sore and heavy~~ wonderful. She slowly hefted herself up as she looked around. There was nobody here. She wobbled onto her feet, stumbling as she felt as if her center of gravity was taken off balance. She didn’t even grab the skateboard lying on the ground. As she wandered up the hill and into the sleepy town, she swore something felt off. Her head was so foggy, trying to remember… Anything… What was she doing again? It was only then that she noticed herself in the reflection of a closed shop.

Her swollen belly was gone, and she was now ~~burdened~~ blessed with enormous tits and an equally large ass, both of which swayed with every motion she made and only unnoticeable in this dazed state of hers. This was covered completely in a layer of slime that barely resembled a skimpy-looking teal dress and was pretty transparent. In fact, if one was looking at it at the right angle, it almost seemed like she was totally naked. Her eyes even seemed ~~a tad differen~~t their totally normal teal color.

All of that paled in comparison to what she had packing between her legs. Swaying from side to side freely this whole time was a large set of slime cock and balls that formed around her pussy, every touch and brush against something sending pleasure right to her brain. Even reaching down and giving it a tap caused her to moan as it leaped up in an erection. Despite being made totally of slime, gripping it never caused it to break or get squished away, and instead, it felt so… Real. She stroked it publicly without shame, letting out moans the whole time as she cocked her head back to savor the moment. It was then that everything came flooding back…

“Oh right! I’m Speedy Specter, the fastest skater and hottest slut in Canterlot~” ~~Rainbow Dash~~ Speedy Specter declared, laughing to herself as she slapped her own tits. It was good to finally have a body all on her own to parade and flaunt! All that she needed to do was take it for a test drive. Luckily, she reached between her now large cleavage and whipped out the cracked phone that had dropped during her possession, and flipped through the pictures and contacts. “So many to choose from… I wonder who I should try first…~”