User blog comment:IamJakuhoRaikoben/Chapter 334: Sin and Sacrifice, Review./@comment-5201137-20130608072239/@comment-3987368-20130608072809

I think nobody thought of that because it's ridiculous even by Mashima's standards. Zeref hasn't shown up in person this entire arc so why would he just show up and revive Gray when he just happened to die with no warning at all?