User blog comment:BlackWizardZeref/Fairy Tail Chapter 394: Juvia vs Keith Review/@comment-7418318-20140725085651/@comment-5303512-20140725105402

I don't think that Natsu is going to solo E.N.D. because then there would be no per pose to Gray getting a power up.

If Demon Slayer Magic even works that is, just like God Slayer or Dragon Slayer for that matter. Because to me, slayer magic hasn't worked so far.