User blog comment:Miskos3/Fairy Tail 536: The Flame of the Dragon's Roar, Review/@comment-31694187-20170519185728/@comment-7418318-20170520073220

Natsu just saw Zeref re-assemble himself from complete disintegration as you just stated yourself and then you expect Natsu to "finish off" Zeref?

How is he supposed to kill Zeref when Zeref can even return from being turned into a pile of ash?