Rocker Tom Morello is shedding light on Ozzy Osbourne’s final Black Sabbath show. The late metal god’s friend, 61, shared that Osbourne knew Black Sabbath’s Back to the Beginning concert July 5 would be his last performance. The Prince of Darkness died July 22 at 76.

Ozzy plays a major role in the song's spacy, blissed-out sound, using a Leslie speaker to achieve the swirling, vibrational effect on his vocals. It was an effective vibe shift and remains one of his most unique performances.