Talk:Magic Duel/@comment-74.119.169.142-20121112053513/@comment-26973802-20121112205934

Without the Crystal Heart Celestia and Luna weren't powerful enough to destroy him. The power of the Crystal Heart is everything that represents the opposite of him, and we see rays of light coming from him while we know his element is shadow, and his head was still intact after being turned to shadow, unlike here as evidenced by his horn among the pieces of him

But I don't think they'll kill off Trixie unless she becomes the same kind of evil as Sombra. While she's more of an arrogant boaster, maybe her Element of Disharmony will act like a Venom symbiote from Spiderman 3, both giving her power and turning her into true evil, in which case she'll probably be defeated by destroying it.