The Epic Battle Of Good Versus Slightly Less Good But Still Pretty Good In The Long Run

Princess Luna attempts to overthrow her sister's rule... with pillows.
Celestia is highly amused.

The original fanfic can be found here:
http://www.fimfiction.net/story/163757/the-epic-battle-of-good-versus-slightly-less-good-but-still-pretty-good-in-the-long-run