How does the mind work? Is evil separate to it or grown from one's soul?
We shall never truly know.
Plunge into mind of Luna as it was, in the last stages of corruption by Nightmare Moon, and understand, what truly came into her head in those final, dark days of shadow.
Madness is very, very real.
Cover art from
http://majinkamael.deviantart.com/art/Nightmare-Moon-349535961
First story ever written. It is a oneshot, hope you like it.