Nightmare Moon has convinced Luna to let her be in sole command of Luna's body. She has promised her power and, most importantly, the love of every pony in Equestria. But, when Nightmare Moon does take control, Luna finds out that switching places with the demon in her mind, might not be a very good idea.

A short one-off to help me practice pacing. I thought it sounded like a good story, and I wanted something for my readers to read while they wait for me to get back to my other story.