User blog comment:FairyRaven/Fairy Tail Chapter 465: 400 Years, Review and Commentary/@comment-5303512-20151207143157

Very interesting Chapter, the only problem that I had was END not being Tartaros's master. I had hoped that Natsu was or will have a demonic form but I am holding out hope if we get more info on him and the One Magic that created Curses.

I have a feeling that unlike his fellow Etherious brethren, Natsu as END doesn't want to kill Zeref because he is aware that he would die if Zeref dies and wants to live.