User blog comment:IamJakuhoRaikoben/Chapter 247:Right Beside Each Other, Review./@comment-3556212-20110821070608

I don't think the explosion was from Hades I think its from someone or sometime else. Patherlily referred the "Grimoire Heart" to the thing that they've found maybe its a demon not a dragon or both which powers hades and if the exceeds destroys or do something about it then Hades will become weak or possibly die from losing his powers