"I am the Arch-fiend, the Despoiler of Worlds, and by my hands shall the false Emperor fall." — Abaddon, Warmaster of Chaos

Abaddon, also known as Abaddon the Despoiler, once named Ezekyle Abaddon, is the Warmaster of Chaos, a Chaos Lord and the greatest Champion of Chaos Undivided in the galaxy. He is the commander of the Black Legion of Chaos Space Marines and is rumoured to be the clone-progeny of the Warmaster Horus, the greatest Traitor in Imperial history, and at one time his most favoured son amongst the Space Marines of the Sons of Horus Legion.