Fan Casting Rudy Jones in Superman: Man of Tomorrow

A worker for S.T.A.R. Labs who believed that the managers kept the paychecks in crates. After opening a crate, he was blasted by radiation which turned him into a purple skinned humanoid. Jones now had the ability to absorb the life energy of other people, leaving smouldering skeletons. This power was necessary for his survival as his own body is in a constant state of hunger for energy that it can't sustain on its own.