User blog comment:IamJakuhoRaikoben/Chapter 368: The Third Seal, Review./@comment-5598380-20140124212807/@comment-4829046-20140125112802

Or they reveal that they thought up something with a little help from Mavis to counter such a large area attack if they ever face one again. I mean it makes sense to do so since they would eventually face Acnologia again and they saw first-hand that they are useless against any Dragon. But considering that all they do at the Guild Hall is party, I doubt that.