Twilight did her duty. She saved everypony she could, except herself. Now trapped by an evil cult, in more pain than she has even been in before, and dying on a sacrificial altar, she calls for help. The Nightmare answers.

Will Twilight become the next evil to threaten the world or will the Nightmare simply be glad to have some freedom? One thing is for certain, Twilight's life will never be the same again.

The Editors
Cander (CH 1-Current)
Yutah123 (CH 8-9)

Now with an excellent reading by StraightToThePointStudio (Currently only up to CH 30)

And we even have art!
[Warning Spoilers] Twilight's Nightmare Art