User blog comment:FairyRaven/Fairy Tail Chapter 399: Wings of Despair, Review and Commentary/@comment-24066070-20140908130106/@comment-25111584-20140908141921

An E.N.D. pumped up with Acnologia's power? That's a frightening thought ... Would be fun! ... Though that might mean Dragon as well as Devil Slaying is super effective on him, guess it would provide a perfect strategic reason to have Natsu fight E.N.D. alongside Gray.