During the Joker’s "Last Laugh" riots at the Slab, Black Mass used his powers to draw the entire facility into a gravity well. A bullet to the head left Black Mass a vegetable,[1] but he retained his powers and is now the cellmate of Doctor Polaris, unwittingly keeping the magnetic villain's powers in check. Still brain damaged, Black Mass was last seen rejoining the Cadre under the leadership of Polaris in San Francisco.