Black Sabbath retired following an extensive farewell tour from 2016 to 2017. The shows featured three of the band’s four founding members – singer Ozzy Osbourne, guitarist Tony Iommi and bassist Geezer Butler – but not original drummer Bill Ward, who pulled out of the band several years earlier due to a contract dispute.

Ozzy Osbourne will reunite with Black Sabbath in his hometown of Birmingham for a farewell concert. Here's a look at the wild life of the "Prince of Darkness," including the time he bit the head off a bat.