With Ozzy out front, Black Sabbath's deafening live attack pivots between doom soaked in thick and apocalyptic atmosphere that renders concertgoers mute (“Black Sabbath”) and riff-wailing beasts that whip the audience into a violent headbanging frenzy (“Children of the Grave”). In contrast, the Dio numbers transport fans into mystical nether realms with ornately melodic solos and tightly focused rhythms (“The Mob Rules”).