User blog comment:RennaGraceCarter/Chapter 327 My Part Too - Review/@comment-203.82.92.26-20130414012153/@comment-15267891-20130414061559

my theory: maybe it's Zeref who sent the dragon slayers to the future. I also think Zeref is a time traveller. And because of overusing that power he becomes cursed in the way that people around him dies.