User blog comment:IamJakuhoRaikoben/Chapter 244: Thunder Crashes, Review./@comment-2106167-20110723075605/@comment-3290324-20110723151252

Well, you have to consider the fact that Laxus is completely uninjured while most of the others are completely and totally injured. In addition, Hades let Natsu and the others attack him without effort at the beginning of the fight, but he emerged uninjured. The same is probably true for Laxus' headbutt.