One Hearts and Hooves day, Rarity is helping Twilight test a new transformation spell that ends up with her becoming a giant dragon. After being chased away by the frightened citizens of Ponyville, Rarity flees to the mountains. Spike then has to set out on a journey in order to save the girl of his dreams.

Art by WillisNintey-Six on deviantart

EDIT: I went back into the story and fixed a bit of proof reading errors and I touched on some of the issues with dialogue that Macho Madness brought up. Overall the story is the same but some of the character interactions are a bit different if you want to check it out. Also, for some reason, and only Macho seemed to notice, the indentation is really weird and for some reason I can't fix.