n 1979, the planets seemed to have aligned for the greatest of all heavy-metal bands and the greatest of all heavy-metal singers. Black Sabbath were a band without a frontman after sacking Ozzy Osbourne, and Ronnie James Dio was a frontman. It was a new beginning for Black Sabbath, a new sound that would be developed in two monumental albums: 1980’s ‘Heaven And Hell’ and the following year’s ‘Mob Rules’.
