User blog comment:Miskos3/Fairy Tail 538: When the Flame Goes Out, Review/@comment-47.150.126.254-20170604234201/@comment-47.150.126.254-20170605135758

We've seen how strong a dragon is from Erza vs. Irene. A single hit broke all if Erza's bones. Jellal was crushed, so it can be assumed his injuries are just as severe.