User blog comment:FairyRaven/Fairy Tail Chapter 347: Red, Blue, Blond Hair Fight! Review and Commentary/@comment-2214433-20130816143856/@comment-49.184.76.171-20130816145324

Hmm, the Galuna Island Demons is very plausible, perhaps they obtained more Moon Drip and help undo the Retrogression Magic that is placed on Erza and Natsu...

Or maybe Gray actually went all the way to Galuna Island and bring them here O_O.