So in the first episode of Season 3 we get to see Celestia using magic that is decidedly darker than her usual. After discussing it with friends and hearing how the premiere episodes had parallels with The Lord of the Rings I was reminded of one of my favorite quotes that inspired this image:

"In place of the Dark Lord you will set up a Queen. And I shall not be dark, but beautiful and terrible as the Morning and the Night! Fair as the Sea and the Sun and the Snow upon the Mountain! Dreadful as the Storm and the Lightning! Stronger than the foundations of the earth. All shall love me and despair!" -Galadriel, The Fellowship of the Ring