Talk:Twilight's Kingdom - Part 2/@comment-26973802-20140430031018/@comment-24092299-20140430040230

My theory is that the villain absorbs all magic it comes in contact with. Kind of like how Chrysalis fed off love and was able to defeat Celestia. Similarly to the ending of A Canterlot Wedding, it will take a very powerful blast of magic to defeat him (the villain), hence Rainbow Power.