User blog comment:FairyRaven/Fairy Tail Chapter 435 & 436: The Cry of Victory & Memoirs, Review and Commentary/@comment-7418318-20150518195726/@comment-7418318-20150518201331

But with these revelations there is one thing I'm confused about, though that will probably be explained in the "Natsu meets Igneel" flashback when we get it.

How did Natsu create curses, form Tartarus and then forget all about it? And why did he only start aging at a normal Human rate after being raised by Igneel?