Fluttershy was not exactly King Sombra's first choice in matters of supernatural possession, but he's in a bit of a bind at the moment. When he was destroyed by Twilight and her friends, King Sombra's soul remained behind and possessed Fluttershy. Urged on to perform unspeakable acts against her fellow equines, Fluttershy is in the fight of her life against the toughest enemy she's ever faced...

And her friends don't know a thing.