User blog comment:Renkrisb/The Dragneel Brothers/@comment-26416024-20150519215248/@comment-26416024-20150520031828

@Wrath022 Zeref said "To be precise... The one he couldn't kill". That sounds more like being unable to kill more than choosing not to. I highly doubt Igneel is stronger than E.N.D. Either way it changes nothing and E.N.D's powers and memories were sealed in the Book of E.N.D. because of just how evil and powerful he was. Let's face the facts. Even Acnologia has some fear of E.N.D. whether he wants to admit it or not.