After Derpy accidentally wounds Twilight, Rainbow comes after her. Now the gray pegasus has to deal with an angry weathermare, an angrier dragon, a forest fire and the Mark of Doom.

What if Nightmare Moon had beaten Celestia?

Not really dark, but tagged one just in case.

*EDIT* decided to turn this to an ongoing series.

Daring Do and her lovely asssitant Ditzy Do are hired to retrieve a stone idol from deep beneath Canterlot dungeons. Then Rainbow Dash and her lightning-obsessed lover - and Ditzy's sister - Derpy Hooves get involved. Then things get complicated.

In the same continuum as "The Queen of Storms" (mature).