Developing new spells is a dangerous game.

When done right, the invention of a new spell can change the world, but even a slight miscalculation can have serious repercussions.

Twilight Sparkle is the best of the best, there's no doubt about that. But when a magical experiment backfires, she has to contend with the most horrible of all unintended side effects: Magic Feedback.

Let the hiccups begin.

Princess Celestia tires of constantly being surrounded by decorum, deference, and formality, and decides to take a day off from being Princess. But visiting Ponyville incognito is harder than she expects. Will she be able to fit in and make friends without blowing her cover?