User blog comment:Bluefox87/Chapter 416 Natsu is E.N.D...WHAT?!?/@comment-197.224.47.254-20150120163353/@comment-25032153-20150121003432

well if that is the case then the scarft that he wears always if you think about that it could be a limiting the dark thoughts of E.N.D or as he has E.N.D was the original persona of Natsu so it could have chosen to lose to Igneel so he could learn fire dragon slayer magic so he could defeat Acno and kill Zeref.