"I didn’t realize then that I would never see Ozzy again after that night," Butler writes of the July 5 "Back to the Beginning" show in England.

Black Sabbath’s Geezer Butler is reflecting on the band's final rehearsals with Ozzy Osbourne. In a piece written for The Sunday Times, the band's co-founder detailed how "frail" the late rockstar was in the lead up to their Villa Park show in Birmingham,

Geezer Butler of Black Sabbath didn’t just lose a bandmate with the death of Ozzy Osbourne — he also lost a friend.