User blog comment:IamJakuhoRaikoben/Chapter 498: Gray vs Invel, Review./@comment-27792306-20160822204523/@comment-7418318-20160822205333

Ever since he got IDSM he's been stupid. Maybe Invel was mistaken and rather than insanity, that magic causes stupidity. And rather than it happening later down the road, it started the moment he got the magic and is steadily growing worse.