User blog comment:IamJakuhoRaikoben/Chapter 473: Red Lightning, Review./@comment-87.117.37.237-20160215161733/@comment-87.117.37.237-20160215164159

I re-read chapter and understood that it is not lightning itself what damage Wahl. It seems that spell works literaly as "Mercury Fulminate" - it worked like catalyst and made Wahl himself explode. Interesting to see it's effect on human.