my little pony - Friendship is infected [updated]

Instructions

Basically the story ------------------------------------------ Everypony in Ponyville was doing their normal things. Lyra and Bon Bon with their conversations, Derpy with the mail, and of course, Twilight sucked into her studies. Spike tried getting Twilight to enjoy the lovely day outside, but she refused every time. All she wanted to do was to read any book she didn't yet. "C'mon Twilight! Everyone is outside in the sun! I bet our friends are waiting." "Sorry Spike, but this book here is just too interesting, that I can't stop!" "Well, what book is it?" "A pony's guide to unknown infections and diseases." "Doesn't sound too 'unknown' to me. Can't we just take a small break?" Twilight sighed and shut the book. "I guess a small break wouldn't hurt." Spike and Twilight walked around Ponyville, taking in the sights and sounds. The birds flew through the cloudless sky, and the small animals frolicked in the vast fields. Twilight took a deep breath and smiled. "You were right Spike! this was worth it to put away my books." Spike nodded. they continued on the path for quite some time before a certain blue, rainbow maned somepony dashed pass. Rainbow was practicing her Wonderbolts stunts for the upcoming show at Canterlot. She dashed past the trees, and did air cartwheels, and back flips. She did twists and loops, and to finish off practice, she flew up past the clouds, and raced down to the ground to create a Sonic Rainboom, coloring the sky with hues of red, blue, and yellow. Twilight and Spike clapped as Rainbow landed, with a big smile on her face. "Hey guys! was that awesome, or what?" "It was amazing! Right, Spike?" "Yeah! how do you do it?" Rainbow chuckled "Gotta practice till you don't fail!" Twilight laughed. "Oh come on. It's a mix of air movement and the aerodynamics of Rainbows wings. the wind changes the mass and..." Twilight stopped as Spike had a blank smile. "You don't understand anything I just said, do you." "Nope!" Twilight Face-hoofed (Hoof palmed?) and sighed. "Oh well, we should probably get back to the tree house anyway. Bye Rainbow!" Twilight and Spike passed Derpy on their way, but something was...off, about her. She looked blank and just said "muffins" repeatedly. Oh well, probably just Derpy being, well, Derpy. Twilight raced upstairs to finish her book and Spike heated up some water for tea. He was about to add the teabag, when a yell from upstairs startled him. He raced upstairs and saw Twilight throwing books left and right. "Twilight, what happened?" "My book! It's gone! I can't find it anywhere!" Spike helped look, but the book has simply...vanished. It's like it never existed. Spike started setting the books back on the shelves, but a small piece of paper under a book caught his eye. He picked it up and unwrinkled it, seeing it was a book page. "Hey, Twilight, what book does this page belong to?" Twilight gasped when she saw it and took it immediately. "Spike! This is page 163 from 'A Pony's Guide To Unknown Infections And Diseases'! This is chapter 89!" "Well, what does it say?" Twilight glanced it over and read it out loud. "Disease no. 5567, the Muffin Disease. This disease can be spread through bites, and makes anypony who has it crave muffins. it destroys a pony's sanity until the pony starts attacking other ponies for any muffin. It then makes the pony highly cannibalistic, causes mutation and loss of the ability to speak. This disease can sadly infect a pony at birth because of the pony's weak immune system. There is no known cure for the disease, and if a pony has any symptoms, it's highly advised to kill them before stage 2. Stage 1: The pony's eyes become slightly deviated, and the pony has a liking for muffins. their IQ slightly decreases as well, and they have a somewhat cheery personality. Stage 2: All sight seems lost, yet it's extremely advanced. The pony has a permanent smile that starts losing coziness. The pony only mumbles the word muffins, and they lose their sanity. Stage 3: The pony now attacks any pony who speaks. the infected pony can now contaminate others, and will also eat other ponies. Their legs have started growing, making them quite tall. Stage 4, Final stage: The pony has become one with the disease, not caring if what they eat is a muffin or not. They have lost any ability to speak, but they make loud moaning noises, as if calling for anypony to help them. If they see you, they will let out a loud roar and chase you down. they are extremely fast and they can only rely on sight. their legs have multiplied, giving the pony eight legs in total." Twilight had gone pale reading this, and Spike, covering his mouth. The book dropped to the floor, with a small thump. Twilight shook her head slowly before a certain... Could not put much