User blog comment:IamJakuhoRaikoben/Chapter 445: The Ugly Fairy, Review./@comment-24228963-20150718064255/@comment-1153699-20150718192339

http://img4.mangasee.co/series/FairyTail/0373-004.png http://img4.mangasee.co/series/FairyTail/0373-005.png http://img4.mangasee.co/series/FairyTail/0373-006.png

Natsu said he's gonna beat E.N.D, Zeref replied saying not even Igneel could kill him and that he is the strongest Demon he has ever created. Zeref was clearly hinting at E.N.D's strength here.

While Prime Igneel may still be superior to him after all, E.N.D giving some sort of a fight against him already puts him at a level that is unreachable for Lucy imo.