Ever since Luna returned from her banishment and been cleansed by the Elements of Harmony, she has always been worried that she would turn back into Nightmare Moon. So without telling anypony she made a magical construct, named the Tantabus, that would plague her with dreams and nightmares of what would happen if she did turn.

That is until one night the Tantabus did something that Luna never thought would happen, it gave her a good dream.

Holy hand grenade! This for featured! 05/24/2017

The story is inspired by stories Tantabus, Mk. II and Aunthood Issues by the great Rambling Writer

Go check them out if you haven't :)