In October 2006, Dio joined Black Sabbath members Tony Iommi, Geezer Butler, and former Black Sabbath drummer Vinny Appice to tour under the moniker Heaven & Hell, the title of the first Dio era Black Sabbath album. They chose the name Heaven & Hell as Iommi and Butler were still in Black Sabbath with Osbourne and felt it was best to use a different moniker for the Dio version of the band. Original Black Sabbath drummer Bill Ward was to be involved in this project, but later withdrew.