User blog comment:Miskos3/Fairy Tail 541: The Magic of Hope, Review/@comment-26746894-20170627040224/@comment-7418318-20170627054352

They are only trying to buy time until the DS have defeated Acnologia's spirit (or whatever it is) within the Ravines of Time.

Either that will outright kill the body along with the spirit or they can work to get the DS out of the Ravines and have them finish the fight once the Dragon comes out of the Sphere again.