The nightmare began with Princess Luna walking into the throne room of the Castle of the Two Sisters.
"Luna! I have been looking everywhere for you, where have you been? The castle is under attack!" Celestia shouted across the room as two bat ponies banged against the thick stained glass windows.
"My plan..." Luna said, a sly grin spreading across her face. "My plan is working."
"This... This is your army?" Celestia spluttered in disbelief.
"Yes. My troops are going to take apart this castle and rebuild it to suit my liking. It's rather drab."
"Luna, how could you?" the princess said, shooting an angry glare at Luna.
"Don't call me Luna... I prefer Nightmare Moon. And now, for my appearance."
Luna's horn glowed blue. Waves of sparks arose from the cracks in the cold, stone floor. They rose like flames and consumed her. The magic seeped back through Luna's body and her coat slowly darkened to a deep black. Her horn and legs grew and her wings transformed so they almost looked like a bat's wings. Next came her