lightnings weakness is water or ground Ground does not get hurt by any electric powers Water weakens lightnings.
Griffin is the main antagonist in the novel The Invisible Man and its following adaptations. He creates a potion that can make him invisible, but in the cost of losing his sanity.
In Alan Moore and Kevin O'Neill's series The League of Extraordinary Gentlemen, there is an incarnation of the Invisible Man called Hawley Griffin. Like the character of the original novel, Griffin is a megalomanical psychopath whose insanity and brutality are amped.