Black Sabbath bassist Geezer Butler did the same to match Iommi. All songs by Tony Iommi, Ozzy Osbourne, Geezer Butler and Bill Ward. Geezer Butler also downtuned his bass guitar to match Iommi. All songs written by Ozzy Osbourne, Tony Iommi, Geezer Butler and Bill Ward. All songs were written by Ronnie James Dio, Tony Iommi, and Geezer Butler. All tracks written by Black Sabbath (Geezer Butler, Tony Iommi, Ozzy Osbourne and Bill Ward). All songs written by Geezer Butler, Ronnie James Dio and Tony Iommi, except where noted. The subsequent tour saw Osbourne reunited with erstwhile Black Sabbath bandmate Geezer Butler on bass. GZR was an American heavy metal band led by Black Sabbath bassist/lyricist Geezer Butler. All lyrics written by Geezer Butler, except for "Fairies Wear Boots", written by Ozzy Osbourne. The relationship between bassist Geezer Butler and AC/DC guitarist Malcolm Young was quite tense. Newsted cites Geezer Butler of Black Sabbath as his major influence. Geezer Butler also returned to Sabbath that year. Guy McAffer (aka The Geezer), and DDR. With Iommi and Geezer Butler the only original members, this line-up produced "Mob Rules".