User blog comment:IamJakuhoRaikoben/Chapter 449: Mavis & Zeref, Review./@comment-11721917-20150824064327

I think Fairy Heart is a way to seal the Ankhseram Curse by separating the body and spirit. And of course, unsealing it will cause a nuke of concentrated death curse to descend on the planet, killing every living being instantly.

->Somehow, this idea's too far fetched. -_-

Anyway Boss Rai, looks like SS Zervis was already irreparable. I recommend a Viking funeral. :P