User blog comment:IamJakuhoRaikoben/Chapter 492: Elder Sister and Younger Sister, Review./@comment-118.136.106.144-20160705013404/@comment-92.2.72.112-20160705150821

What if Mard Geer's "essence" still remained. Mirajane's magic hasn't been explained very clearly to us and we don't really know the mechanics behind it so it shouldn't be beyond the realm of possibility.