User blog comment:Tristan Tsunami/Theory on the Dragon Slayers 2/@comment-166.137.136.27-20150129142718

I believe that the first gen dragon slayer were actually trained not long before acnologia turned into a dragon. Then when he transformed the dragons used some kind of lost magic to bond themselves to the slayers. The bonding magic put the slayers into a stasis similar to what happened on tenrou with the fairy sphere and they all just woke up on July 7th X777.