User blog comment:RennaGraceCarter/Chapter 327 My Part Too - Review/@comment-203.82.92.26-20130414012153/@comment-5951335-20130414070043

In response to NoNickNeeded (I don't know why, but I really like your username, lol) the instructions on how to create Eclipse existed long before X777, in the Book of Zeref. It's possible that the gate was built, used, and then destroyed in the past, and they rebuilt it. This would mean that the first gate had a much, much longer time to charge up than the second gate did. 400+ years worth of magic is most likely equivalent to seven GMGs.