Black Mass

Black Mass is the name of a fictional DC Comics supervillain. He first appeared in Justice League of America #233 (December 1984) Geoffrey Thibodeux was a small-framed physicist who was granted a bulky body and gravity powers by wristbands provided by the Overmaster, who drafted him into the original Cadre under the alias Black Mass. Following their battle with the Justice League of America, Black Mass was sent to prison. Years later, he briefly lost his wristbands to Wally Tortolino in a card game but had them returned. Eventually the wristbands and their power bonded permanently with his body. 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, 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... full article at wikipedia