User blog comment:IamJakuhoRaikoben/Chapter 451: Fairy Heart, Review./@comment-25111584-20150907073749/@comment-2214433-20150907123659

Well, Fairy Heart is basically a lacrima of endless magic, right? And when they were shooting Etherion back in Tower of Heaven arc, it was powered up by a lacrima, right? So just switch the two and hooray /o/