User blog comment:LordLuminous/Reviving END: Curse Power Needed? Questions/@comment-117.216.108.42-20140727073058

MY suggestion is that if Natsu is attacked by curse power ...He will become a demon so only igneel placed scarf on his neck which was removed when natsu was imprisoned by tartaros.Maybe lumen histoire deals with fairy tail weapon to kill natsu if he turns into demon...So Gildarts who known this fact had gone to find igneel ,so that natsu will control his anger when curse is being targeted on him...Only END or Natsu could reach Zeref's limit.....So Natsu maybe Zerefs ultimate demon His own son....Its my own Theory...