User blog comment:Miskos3/Fairy Tail Chapter 486: The Fourth Guest, Review/@comment-24734624-20160523225419/@comment-7418318-20160529063417

Considering how Wendy can enter DF at will without eating anything, I think it is quite possible that he might also be able to do it.

Don't forget that there was one year of time since he fought Torafusa. As part of the Rune Knights he probably had plenty of reason and time to both train and fight criminal mages.