Jeffrey Franklin Burr, the mad scientist and terrorist known as Kobra, has been a dangerous, powerful, and enigmatic villain for many years, coming heavily into contact with groups such as Checkmate, the Outsiders, the Suicide Squad and the Justice Society of America. Kobra intended to bring about the Kali Yuga on earth. He was recently apparently killed by Black Adam. Jeffrey had Jason killed. He was later resurrected by the Kobra Cult. He set about destroying all those who had taken Jeffrey as their savior.