User blog comment:RennaGraceCarter/Chapter 327 My Part Too - Review/@comment-7418318-20130414064845/@comment-5951335-20130414074625

Time travel... I forgot about time travel.
 * facepalm*

Although, what about the runes from the Fighting Festival Arc? It said that people over the age of 80 couldn't pass, and Natsu and Gajeel couldn't pass even though they looked young enough.