User blog comment:FairyRaven/Fairy Tail Chapter 401: Igneel vs. Acnologia, Review and Commentary/@comment-77.194.131.12-20140922125827/@comment-31.61.131.139-20140922140305

I actually wonder if END is really a flame demon. We only know it from Silver - the same Silver who said that Face will surely be stopped by killing Keith.

And this is interesting, because he surely knew how Sayla's macro worked.