While investigating the reason behind the Nukelavee's appearance in Equestria, Twilight and Fluttershy stumble upon a worn and stained journal belonging to a student of Celestia's School for Gifted Unicorns.
Magic is dying and cutie marks are starting to become harder to gain, even if a pony normally should have earned it. Surely there's nothing wrong with giving ponies a little magic push to get the rest of the way. Right?