Coup de alicorn (strike of the alicorn)

3 months after the Canterlot royal wedding.

Princess celestia was in her bedroom sleeping but she was not having a pleasant dream.

Inside of princess celestia's dream:

Princess Celestia was in her garden when all of a sudden an eerie black smoke began to rise out of the ground, in fear she began to shake when she heard a sinister laugh as it grew louder, she shouted who are you? hello princess celestia! it bellowed. Your faithful student,Twilight Sparkle might have defeated my dark forces, but she won't be able to defeat the evil thats inside. you won't be able to use the elements of harmony. I took them and hid them in a place you won't be able to find them, or any pony for that matter. I hope you have bad dreams. It snarled. In rage, princess celestia shouted who are you?!? The shadowed figure was shocked. What you don't know who I am? It boomed, my identity will be revealed in due time, princess!