User blog comment:Miskos3/Fairy Tail 525: Why Did the Emperor Never Love His Child?, Review/@comment-41.136.49.68-20170304143139

I have one question that has been bothering me.

1. Early part of this arc, Zeref needed to die at the hands of Natsu. Then Happy happened and they didn't fight. 2. Next, Zeref wanted to kill Acno. He needed the body of the Mavis for that, hence the war. 3. Now he wants to kill both Natsu and Acno to save the world.

So, why not kill acno then die against natsu? could he not have explained his situation more. same applies to natsu now that 'he is human' and will not die along with zeref.