Playlist Black Sabbath were an English rock band formed in  Birmingham in 1968 by guitarist  Tony Iommi, drummer  Bill Ward, bassist  Geezer Butler and vocalist  Ozzy Osbourne. They are often cited as pioneers of heavy metal music. The band helped define the genre with releases such as  Black Sabbath (1970),  Paranoid (1970), and  Master of Reality (1971). The band had multiple line up changes following Osbourne’s departure in 1979, with […]