User blog comment:Miskos3/Fairy Tail 520: Dragon or Demon, Review/@comment-29874610-20170204151505/@comment-1776824-20170205023331

? Everything Mard Geer said was a lie. Natsu never created curses, never created Tartaros, and whatever other bull he spouted. The seed wasn't implanted when the book was shot. The seed was clearly dormant, and since the book had never been damaged or pierced, the act of piercing it merely awakened the dormant seed to transform Natsu into a full demon. There was a reason that everyone was insistent that the book never be harmed or opened, and it was because of this: it would awaken the seed inside him. The seed is proof that he is END, therefore the seed was always there because he is END, and he was revived. You really are just trying to find ways to make this a retcon so that way it looks like you are still right, when it was proven your entire theory thus far was just wrong.