Quote Originally Posted by Forum Explorer View Post
Dark like the Pokemon type. We have no reason to believe otherwise considering how casually Celestia herself used the magic. Furthermore it just looked odd but it's not like it did anything evil besides looking odd. Finally people are overreacting to the whole thing. If anypony could handle dark magic it's Twilight.
I think the biggest thing about that was that Twilight is developing into some sort of crazy magic sponge, or a "Blue Mage"