Tony Iommi is the lone member of Black Sabbath to appear on all 19 of the studio albums. In fact, 1986's Seventh Star was initially meant to be an Iommi solo record before last minute pressure from their label led it to being released under the Black Sabbath moniker.

“I’m not planning on doing a set with Black Sabbath, but I am doing little bits and pieces with them,” Osbourne said. “I am doing what I can where I feel comfortable.”