Once named Ezekyle Abaddon, "Abaddon the Despoiler" is the Warmaster of Chaos and the leading Champion of Chaos Undivided. He commands the Black Legion of Chaos Space Marines and is rumored to be the clone-progeny of the Warmaster Horus. Known for leading the Black Crusades, he became the master of the Black Legion following Horus' death in the Horus Heresy, making him one of the galaxy's most powerful Chaos Lords and the greatest mortal champion of the Chaos Gods he despises.