The Great and Powerful Wizard Trixie Lulamoon!

As the title implies, this is a story about the greatest wizard that ever walked on four hooves in Equestria—and his apprentice.

Trixie Lulamoon is already Great and Powerful, but a mare can stand to be greater and powerful... er.

She finds Starlight far too busy with running the School of Friendship to be much help, so she seeks out a pony to be her mentor as she becomes a true wizard.