What do you guys think Zeref is intending to do with Fairy Heart once he gets it? Interestingly enough, we've seen both Eileen and August say that he's intending to beat Acnologia with it, but never once have we seen him say exactly what he wants with the magical weapon. There have been a few theories saying that he's intending to undo the seal on E.N.D's book using the excess magic, like a reverse of what Tartaros intended to do with FACE and eradicating all magic on the continent, but personally I don't think Zeref wants to undo the seal, mainly because Igneel was the one who sealed away E.N.D.
So, what do you think Zeref intends to do once he attains Fairy Heart?
So, what do you think Zeref intends to do once he attains Fairy Heart?