Twilight Sparkle has a problem on her hooves. A very hairy problem, to boot. It is not every day that spells misfire, but when they do, the results are strange, to say the least. Turns out, Equestria isn't the only world with inherent magic, so swapping one citizen for another may not be as simple as she thought it'd be.

A one-shot Discworld crossover fic.