User blog comment:Derax-Pagani/Chapter 502 Review/@comment-24102956-20160919112456/@comment-84.197.239.101-20160922200939

August may have retreated, at least for a while. Guess we never will know what he would have decided to do.

August knows Zeref wants to annihilate humanity, but so does Acnologia. He likely prefers to die at the hands of his emperor than at the hands of Acno.

But maybe they can use the Fairy Heart to kill Zeref as well, as the FH is supposed to be infinite Magic. So even Zeref will likely die/be reduced to dust when hit by an attack supplied with infinite Magic.

Well, I'm not to sure how the FH works. In theory Mavis should be able to nuke the living daylights out of the entire Alvarez army as she has infinite Magic. But I don't see her fire an everlasting Fairy Glitter on the enemy, there has to be some restriction.