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Heaven & Hell is a heavy metal band formed by Tony Iommi after the disbandment of Black Sabbath in 1978. The name was inspired by the Black Sabbath song "Heaven and Hell". The band's lineup included Iommi, Ronnie James Dio (vocals), Geezer Butler (bass), and Bill Ward (drums). Heaven & Hell released three studio albums: "Heaven & Hell" (1980), "Mob Rules" (1981), and "Dehumanizer" (1992).