User blog comment:Darknesslover5000/Fairy Tail 258 - Sabertooth/@comment-2245892-20111106203804/@comment-3001427-20111107032430

I like to think that the Dragons purposely took on and trained children to become Dragon Slayers so they could defeat Acnologia. Given that this demonic looking dragon appeared 400 years ago, its not too farfetched to say that the present Dragons anticipated his return, and took measures to stop it.