User blog comment:IamJakuhoRaikoben/Chapter 411: Quid Pro Quo, Review./@comment-25324252-20141201171426/@comment-24800928-20141202030929

I doubt that Gray is barely hurt. He is like half covered in black...

I agree about the spell being nullified part though but some people have given some somewhat satisfying explanations. whether or not mashima uses one of them...