User blog comment:Wrath022/Chapter 524: Black Future, Review/@comment-5303512-20170227145147

Interesting chapter

Totally knew that Acnologia never knew Irene until now, which is logical since Wendy did not smell dragon on her as well.

This Arc has been one surprise after another, Zeref seems to want to save humanity by killing Natsu? I guess there is something more to Natsu that we are not getting.

Well now we can confirm that August does know almost every single spell in existence.