Editing Black Sabbath (section)

===1990–1992: Dio rejoins and ''Dehumanizer''===
While on his ''[[Lock Up the Wolves]]'' U.S. tour in August 1990, former Sabbath vocalist Ronnie James Dio was joined onstage at the [[Roy Wilkins Auditorium]] by Geezer Butler to perform "Neon Knights". Following the show, the two expressed interest in rejoining Sabbath. Butler convinced Iommi, who in turn broke up the current line-up, dismissing vocalist Tony Martin and bassist Neil Murray. "I do regret that in a lot of ways," Iommi said. "We were at a good point then. We decided to [reunite with Dio] and I don't even know why, really. There's the financial aspect, but that wasn't it. I seemed to think maybe we could recapture something we had."{{sfn|Rosen|1996|p=129}}

Dio and Butler joined Iommi and [[Cozy Powell]] in autumn 1990 to begin the next Sabbath release. While rehearsing in November, Powell suffered a broken hip when his horse died and fell on the drummer's legs.<ref name="Blender Review">{{cite web|url=http://www.blender.com/guide/reviews.aspx?id=2229 |title=Blender Dehumanizer Review |publisher=Blender.com |access-date=17 March 2008 |url-status=dead |archive-url=https://web.archive.org/web/20061019162836/http://www.blender.com/guide/reviews.aspx?id=2229 |archive-date=19 October 2006 }}</ref> Unable to complete the album, Powell was replaced by former drummer [[Vinny Appice]], reuniting the ''Mob Rules'' line-up, and the band entered the studio with producer [[Reinhold Mack]]. The year-long recording was plagued with problems, primarily stemming from writing tension between Iommi and Dio. Songs were rewritten multiple times.{{sfn|Rosen|1996|p=128}} "It was just hard work," Iommi said. "We took too long on it, that album cost us a million dollars, which is bloody ridiculous."{{sfn|Rosen|1996|p=129}} Dio recalled the album as difficult, but worth the effort: "It was something we had to really wring out of ourselves, but I think that's why it works. Sometimes you need that kind of tension, or else you end up making the Christmas album".<ref name="Iommi & Dio Interview">{{cite news |last=Wiederhorn |first=Jon |url=http://www.blabbermouth.net/news.aspx?mode=Article&newsitemID=65255 |title=Interview with Ronnie James Dio and Tony Iommi |work=[[Blabbermouth.net]] |access-date=17 March 2008|date=13 January 2007 }}</ref>

The resulting ''[[Dehumanizer]]'' was released on 22 June 1992. In the U.S., the album was released on 30 June 1992 by [[Reprise Records]], as Dio and his [[Dio (band)|namesake band]] were still under contract to the label at the time. While the album received mixed {{nowrap|reviews,<ref name="Blender Review"/><ref>{{cite web |url=http://www.revelationz.net/index.asp?ID=2381e |title=Revelation Z Magazine ''Dehumanizer'' Review |publisher=RevolutionZ.net |access-date=17 March 2008 |url-status=dead |archive-url=https://web.archive.org/web/20080604221624/http://www.revelationz.net/index.asp?ID=2381e |archive-date=4 June 2008}}</ref>}}, it was the band's biggest commercial success in a decade.<ref name="AMG Biography"/> Anchored by the top 40 rock radio single "TV Crimes", the album peaked at number 44 on the ''Billboard 200.''<ref name="billboard_200"/> The album also featured "Time Machine", a version of which had been recorded for the 1992 film ''[[Wayne's World (film)|Wayne's World]]''. Additionally, the perception among fans of a return of some semblance of the "real" Sabbath provided the band with much needed momentum.

Sabbath began touring in support of ''Dehumanizer'' in July 1992 with [[Testament (band)|Testament]], [[Danzig (band)|Danzig]], [[Prong (band)|Prong]], and [[Exodus (band)|Exodus]]. While on tour, former vocalist Ozzy Osbourne announced his first retirement, and invited Sabbath to open for his solo band at the final two shows of his ''[[No More Tears|No More Tours]]'' tour in [[Costa Mesa, California]]. The band agreed, aside from Dio, who told Iommi, "I'm not doing that. I'm not supporting a clown."{{sfn|Iommi|2012}} Dio spoke of the situation years later:

{{blockquote|I was told in the middle of the tour that we would be opening for Ozzy in Los Angeles. And I said, "No. Sorry, I have more pride than that." A lot of bad things were being said from camp to camp, and it created this horrible schism. So by [the band] agreeing to play the shows in L.A. with Ozzy, that, to me, spelled out reunion. And that obviously meant the doom of that particular project.<ref name="Iommi & Dio Interview"/>}}

Dio quit Sabbath following a show in [[Oakland, California]] on 13 November 1992, one night before the band were set to appear at Osbourne's retirement show. Judas Priest vocalist [[Rob Halford]] stepped in at the last minute, performing two nights with the band.<ref>{{cite web |last=Henderson |first=Tim |url=http://www.bravewords.com/features/1000484 |title=Rob Halford Reminisces About Covering For OZZY! |publisher=BraveWords.com |access-date=17 March 2008 |archive-date=24 January 2008 |archive-url=https://web.archive.org/web/20080124013153/http://www.bravewords.com/features/1000484 |url-status=dead }}</ref> Iommi and Butler joined Osbourne and former drummer Ward on stage for the first time since 1985's [[Live Aid]] concert, performing a brief set of Sabbath songs. This set the stage for a longer-term reunion of the original line-up, though that plan proved short-lived. "Ozzy, Geezer, Tony and Bill announced the reunion of Black Sabbath – again," remarked Dio. "And I thought that it was a great idea. But I guess Ozzy didn't think it was such a great idea… I'm never surprised when it comes to whatever happens with them. Never at all. They are very predictable. They don't talk."<ref>Swedish TV interview, broadcast April 1994, transcribed by Ola Malmström in Sabbath [[fanzine]] ''Southern Cross'' #14, p18, October 1994</ref>