Ronnie James Dio joined the band from this album, making this the first album with a lineup different from the original members.
Released in 1980, it reached number 28 on the US Billboard 200.
All the songs were written by Tony Iommi, Ronnie James Dio, Geezer Butler and Bill Ward. The album is full of great guitar tunes, such as "Neon Knights" and "Children Of The Sea". Produced by Martin Birch, who also worked on Deep Purple and Rainbow.