"For the last time Rainbow no!"
"But Twilight, it could help me"
"I said no!"
Rainbow Dash frowned in disappointment, all she wanted Twilight to do was use her magic to make Pegasus fly better, but according to the unicorn, "It will give ponies the wrong impression, and will be lying to everypony," all she wanted to was fly around and see what some of her tricks would look like if she could fly better.
"Now Rainbow, I am going out to buy some more quills, see you tomorrow," Twilight said, she walked out of the library, not knowing that her friend had an evil grin.
"Good she's gone, now I can find a book that will help me," Rainbow proclaimed and began to search around the library.
30 minutes passed and Rainbow Dash was surrounded by books, she checked all of them, and there was nothing. Many of them had tips and spells, but nothing that she wanted. "These books are useless!" Rainbow yelled and threw the book she was checking in rage, the book hit one of the shelves, causing a domino effect on the books on the top shelf. The effect ended when the last book was hit and fell on her head, than to the floor open.
"Ow, dumb book, I should-hey what's this?" Rainbow questioned when she saw a page on the book with some ingredients, under it were the words "fly better" and her eyes beamed, she found what she was looking for, she grabbed the book and flew to her home, leaving a mess and an angry unicorn.
In her room, she read the ingredients for the potion. "Okay, a scale of a dragon, the red of a rainbow, a tooth from a dragon, a chip from an unicorn's horn, and a claw from a dragon," Rainbow scratched her head with her hoof, she wondered why a majority of ingredients came from a dragon? She reasoned that it was because dragons were good fliers and flew out of her room in search for these ingredients.
In Rainbows saddle bag, where a chip from a unicorns horn, she got it from Rarity when she accidently chipped it when she was filling her horn, and a red from a rainbow, which was easy being a Pegasus and all, all she needed now where the ingredients from a dragon, and thankfully Spike was asleep. She snuck into the library into the baby dragon's room, where he laid sleeping in his basket. Rainbow quietly flew to spike, and got her equipment ready. With her tweezers she got a scale of spike, and with a claw clipper, a claw. Now came the hardest part, getting a tooth. Taking out her pliers, she slowly brought it to Spikes mouth; she was sweating porously, and got hold of one of the fangs.
"I hope the tooth pony, gives me a bit." Spike said in his sleep, Rainbow's eyes widened in disbelief, she lifted the pillow and sure enough, there was a tooth. She wiped her brow of sweat and grabbed the tooth, and left a bit there, just for him. She flew out of the house, her face beaming as she flew home.
Rainbow followed the directions, her eyes switching from the book to the pot that was boiling, when the recipe said that it was done, she smiled and pored some of the content into a glass. The liquid was green and had yellow steam coming out of it, and it had the smell of cinnamon buns for some odd reason. Rainbow took the glass, and drank up the liquid, when she was done, she put the glass down and wiped her mouth, surprisingly, it didn't taste bad, in fact it tasted like lemonade. She smiled and thought of getting something to eat, maybe a ruby or a sapphire. Her eyes widened when that thought came to mind, only dragons ate gems, so why was she craving them? Then suddenly, as if she was struck by lightning, she became stiff and felt pain all over her body.
"What is happing?" she asked herself in her head, her teeth clenched and her eyes closed tight, she felt extreme pain in her wings as her feathers fell off and leather like skin replaced her fur, as four bony appendages grew out, as the same leather like skin stretched with it, giving her dragon wings. She managed to open her eyes and look at the wings in shock; this was not suppose to happen. She painfully walked up to the book and read the title; fear plastered her face as she read it "Dragon Potion". She backed away as her rainbow tail fell off and her spine grew, and getting covered with muscles, nerves, blood vessels, and finally, blue scales. She didn't make a potion that helped her fly better; she made one that was turning her into a dragon. But why should she be scared, dragons are more powerful than those puny ponies. She shook her head when those thoughts came to her, she needed to get Twilight and have her stop this. She ran out of the door and flew through the air, her wings held out to help her glide.
Rainbow flew as fast as she could, but because her house was so far away, it would take her forever, it also didn't help that she felt pain again and was forced to land. Her breathes were getting shallow as her back hooves painfully morphed into clawed feet and her legs were bulging with muscles and covered in cyan scales, she sat on her hunches as her for hooves morphed into clawed hands, and her forelegs reshaped themselves into arms. Tears were welling up in her eyes, but was interrupted when she grabbed her head, her muzzle grew longer and her teeth were replaced with sharper ones, her pupil became a slit and her tongue became forked. She looked at herself and smiled.
"I am looking better than ever," She said, she shook her head to get rid of the thoughts, but they were getting stronger, and harder to resist. Her mane fell out as her neck stretched, her entire body became covered in cyan scales, and her muscles bulged. From her head to her tail, she grew spines that were multi-coloured and in the order red, orange, yellow, green, indigo, violet. Rainbow looked at her body, hoping that it was the end, but it was not as she began to grow in size, and she smiled.
"Yesss, turn me into a real dragon," she hissed, she stopped growing when she was over 50 feet tall. Her mind has also changed, but she was Rainbow Dash, only now she thought of dragons being superior to ponies. She looked over her body and noticed that it was still sleek, and her wings were quite larger, making her still the fastest thing in Equestria, but she wanted to test it out.
Giving her new wings some flaps, she got into the air, and flew off as fast as she can; she did some aerials, and some tricks, and noticed that her new body was not only easier to control, but faster. She landed on the ground and folded her wings. "This is great, and my friends will also enjoy it to," she thought to herself, but realized that she couldn't make them drink the potion, so how was she going to spread her gift. She got an idea and flew to her house, knowing that she couldn't live there anymore, ripped off the roof and gently picked up the book, squinting her eyes, she read something that made her smile, if she got her saliva on anypony, they would become dragons. Her smile widened as she put the book back and flew off to Ponyville, ready to spread her gift.