User blog comment:IamJakuhoRaikoben/Chapter 479: Who you should show the greatest respect to is, review./@comment-174.25.36.179-20160401013247

I've wondered about something, so if Natsu kills zeref then Natsu dies so then why does the book of END even exist then as it seems like a major handicap to Natsu's very existence. I've found it strang now that I think about it, which is that zeref says that Mard Geer found the book of END by "chance", like really he finds the book by "chance" and gets a hole bunch of other demons with him during the time that Natsu is time traveling, really?! Like that's not suspicious at all? I wondered about one other which is considering zeref can turn his demons back into their books then what does that say about Natsu himself considering he is a demon but exists alongside his book of zeref (aka END) and that all demons except Natsu are immortal but that again wouldn't matter if he was considering who he was suppose to kill if anything it would be beneficial in the long run wouldn't it so why is Natsu the only demon who isn't immortal from the start?