On a dark night filled with even darker magics, an insane cult attempts to give Nightmare Moon a body and life of her own, utterly separate from Princess Luna. But, when the spell is interrupted by Celestia, something unexpected is created.

Now, a little black alicorn filly named Nyx finds herself living under the care of Twilight Sparkle, only to be haunted by memories and emotions from her past. Is she Nightmare Moon reborn or is she simply a doppelganger with a soul and mind of her own? Can Twilight Sparkle protect Nyx from those who refuse to see past her dragon eyes and black coat?

Or, will Nyx be forced to inherit the sins that may not even be hers and become the greatest evil Equestria has ever known?

Some accidents are small, and some endow you with the power of a godly ruler. On the opposite end of things, you lose your wings along with your ability to move celestial bodies, and you can't tell anypony. Why, because what would they think if the princess became a librarian? It's going to be "fine". Celestia just needs to switch back with Twilight before either of their true identities are revealed. All Twilight has to do is hold down the castle, fight off scheming villains, run the country, and worst of all... deal with all the noble ponies.

Rated teen for shenanigans and some more serious parts. Takes place at the end of lesson zero. Please tear this apart with comments. I like criticism. Comment if you have issues, don't leave me with a mystery thumbs down.

Twilight is invited to Canterlot to compete with some of the greatest magicians in the world for the Moonstone Cup, a prestigious award for the most powerful and skillful magicians, unicorn and otherwise. Can she win? What sort of competition will she face?

Awesome cover image was taken from NoOneBahtim