User blog comment:IamJakuhoRaikoben/Chapter 450: Alone in all the World, Review./@comment-82.136.231.99-20150901202527

This chapter opened my eyes to how the curse actually works, so I think I have an idea of how Zeref is going to die: By contradiction! Right now, Zeref wants nothing more than to die. Therefore, he cannot (contradiction!).I think, Ancselam will only take Zerefs life if he loves it. If Zeref actually wants to live/comes to love his own life, that's when he will be able to die. Probably Natsu will prompt Zeref to be happy he's alive, which will trigger his death. Tragic, but contradictory enough for Ancselam, I take xD