User blog comment:IamJakuhoRaikoben/Chapter 473: Red Lightning, Review./@comment-2214433-20160215155205/@comment-5303512-20160215163634

I think from the meaning "Lightning that surpasses lightning" I think it means it is Acausal Lightning which can work beyond the normality of regular lightning or other magical lightning strike in this case such as harm or defeat other lightning affiliated users or in this case harm lightning immune users.