User blog comment:B214/Chapter 503: The Last Sight Seen/@comment-5303512-20160926122648/@comment-1776824-20160928174131

I'll answer you very quickly, one of which will be with a direct quote from you. For the first:


 * Yes, this is the first time Natsu has awakened as E.N.D. Zeref described that he could not control Natsu very well, and he was very volatile and unresponsive to him, and thus so he could become stronger and learn language and writing, allowed Igneel to take him. E.N.D. has been E.N.D. from the beginning. Whatever power he may have had appears to have been shut away in the book, which could possibly have been released when it was damaged, but this is conjecture on my part. However, if this power was present from the beginning, or sufficient, then Igneel would not have been needed.
 * 1) "Using Deliora [and Lullaby] is not a good example since back then Hiro didn't really thought of what to do with the demons [sic]."