Captain Cold

Captain Cold (Leonard Snart) is a fictional supervillain appearing in American comic books published by DC Comics. He is the leader of the Rogues, a loose criminal association, as well as the older brother of Golden Glider. An adversary of the various superheroes known as the Flash, he has served as one of Barry Allen's archenemies, both adversary and begrudging ally of Wally West, and one of the killers of Bart Allen.