User blog comment:CNBA3/Chapter 413 Review/@comment-82.236.10.146-20141222190049/@comment-5303512-20141223022520

@Nick, Maybe there are things in this world that might stop him or some sort of seal that prevents him from doing so.

He is clearly afraid of E.N.D that Zeref created, it's his blind arrogance that denies that fact.