Talk:Twilight Sparkle/@comment-76.173.83.63-20130306050432/@comment-98.192.147.205-20130308002402

I think the best way to describe it is that she Acended to a higher level of magic. Her unicorn body probably wouldn't have been capable of handling such a high level of magic, therefore her physiology changed to accomodate the higher magical output.

And I dont thing ANY pony can use that spell to become an alicorn. The spell itself was designed to change ones destiny, though it was incomplete. By completeing it she, in a sense, fufilled her own.