User blog comment:IamJakuhoRaikoben/Chapter 353: Exorcism, Review./@comment-7405046-20130927174635

This E.N.D. reminds me of Endless from Rave, so it might be even more important than it seems now.

Within the context of the theory about the 1st Gen Dragon Slayers (and probably 3rd Gen) having come from the past, which I strongly support, it would make sense that they had been sent through time because it would be easier to destroy E.N.D. 400 years in the future or just to protect them until they became strong. Or just because "their power would be needed to exist in the future" (Rave spoiler?).

Btw, I expected Atlas Flame to teach Natsu something about DS magic at some point in the story, like helping him enter Dragon Force at will or something like that. But now he's gone for good ( ._.)