User blog comment:Water Dragon Slayer/DREAM BATTLE CHRONICLES: SECOND MATCH!/@comment-4829046-20130723104110/@comment-4829046-20130723163129

Unless that being wanted to sleep in the first place >_> Maybe it will awaken only when the Crisis begins. And before you say then why didn't it do anything in the time-line where Dragons rules and the one where Acnologia ruled, well I suppose its because there was still life on Earth and it needed a more World Apocalypse type-thing to occur which is exactly what Zeref is about to do.