The Master of Possession is a sorcerer of the darkest calling, a warp-mage who specialises in tearing open the veil between worlds to drag daemons into the flesh of the material realm. Where other psykers hurl fire or bend minds, this adept traffics in binding and possession, making of his own brethren vessels for the horrors of the immaterium.
Wreathed in the roiling energies of the warp, the Master of Possession conducts rituals of summoning even amid the chaos of battle, calling forth daemons to swell the ranks of his warband and empowering the Possessed with unnatural vigour. His whispered pacts and blasphemous incantations thin the boundaries of reality, so that the ground about him crawls with half-glimpsed shapes and the screams of the damned.
A specialist among the sorcerers of the Chaos Space Marines, the Master of Possession is prized and feared in equal measure. He is a gatekeeper of the warp, a warlock whose art turns willing warriors into daemonhosts and whose presence upon the field promises an incursion of otherworldly terror.