Dehumanizer is the 16th studio full-lenght by Black Sabbath, released in June 1992. It was the first album in ninenties to feature again Ronnie James Dio and Vinny Appice together with Geezer Butler.
We remind that first writing and demo sessions at in Birmingham featured drummer Cozy Powell, but he broke the pelvic bone.
It was considered one of Black Sabbath's heaviest albums.
Although the Black Sabbath line-up is the same as Mob Rules, the musical direction is very different, a change from their previous album.
Much of the album anticipates the directions taken by DIO's band in Strange Highways and Angry Machines. The album reached the Top 40 in the UK and peaked at number 44 on the Billboard 200 chart.
This incarnation of Black Sabbath ended when Dio's contract with the band ended several days before the Costa Mesa reunion shows in November 1992. According to Iommi, Dio quit because he was asked to support Ozzy Osbourne's final shows at Costa Mesa.
For the two Costa Mesa shows the band replaced Dio with Rob Halford.
On the second night, Iommi, Butler and Bill Ward also joined Osbourne onstage for four songs. Halford and Dio were friends and Halford would only do the Costa Mesa shows with Dio's blessing.
Both shows were recorded and are circulated as bootlegs. The album is included in the Black Sabbath box set "The Rules of Hell". The album was re-released on 7 February 2011. This version includes a bonus disc with alternate recordings of several songs ("Master of Insanity", "Letters from Earth" and "Time Machine", the latter of which is available on the US version of the album as a bonus track) and several other songs recorded on 25 July 1992 in Tampa.