Celestia asks Luna to teach Twilight dark magic. Twilight must pass Luna's class in order to graduate. As Luna develops feelings for her student, Twilight questions which princess she really wants to serve and protect.
Ten years ago, Twilight Sparkle was officially recognized as the newest Alicorn princess. One year later, her faithful assistant disappeared from the face of Equiis. Now, she has been reunited with him. But, he is not the same. (WILD WEST X PONIES)
Thought to have been killed as a filly, Twilight Sparkle is discovered to be returning to Canterlot. Instead of a joyous reunion awaiting her, a trail of destruction follows her as Celestia and Luna struggle to discover how, and why, she's returned.