User blog comment:Bluefox87/Chapter 416 Natsu is E.N.D...WHAT?!?/@comment-197.224.47.254-20150120163353/@comment-24996865-20150121004839

maybe the scarf helps restrain some of his demon magic. Remember back in Tenroujima, Zeref's magic almost killed Natsu, but his scarf took all the damage