As part of her latest attempt to improve the Grand Galloping Gala, Princess Celestia presented Twilight with a scroll of little-known spells to try out. Unfortunately one of the most potent was fired off days before the Gala was to begin and now Rarity's much too big to work on her garments, Twilight's fretting over the obtuse wording for the counter-spell and Celestia's concerned that this will spoil the surprise.
