Black Sabbath are an English rock band, formed in Birmingham in 1968 by Ozzy Osbourne (lead vocals), Tony Iommi (guitar), Geezer Butler (bass), and Bill Ward (drums and percussion). The band has since experienced multiple lineup changes, with a total of twenty-two former members. Originally formed as a heavy blues-rock band named Earth, the band began incorporating occult- and horror-inspired lyrics with tuned-down guitars, changing their name to Black Sabbath and achieving multiple gold and platinum records in the 1970s. As one of the first and most influential heavy metal bands of all time, Black Sabbath helped define the genre with releases such as 1970's quadruple-platinum Paranoid. They were ranked by MTV as the "Greatest Metal Band" of all time, and have sold over fifteen million records in the United States alone.

Vocalist Ozzy Osbourne's drinking led to his firing from the band in 1979 and was replaced by former Rainbow vocalist Ronnie James Dio. After a few albums with Dio's vocals and his songwriting collaborations, Black Sabbath would see a revolving lineup in the 1980s and 1990s that included vocalists Ian Gillan, Glenn Hughes, Ray Gillen and Tony Martin. In 1992, Iommi and Butler rejoined Dio and drummer Vinny Appice to record Dehumanizer, an album which stands to be Black Sabbath's heaviest album to date. The original lineup reunited with Osbourne in 1997 and released a live album, Reunion. The early/mid 1980s line-up featuring Iommi, Butler, Dio, and Appice reformed in 2006 under the title, Heaven & Hell.

Formation and early days (1968–1969)

Following the breakup of their previous band Mythology in 1968, guitarist Tony Iommi and drummer Bill Ward sought to form a heavy blues band in Aston, Birmingham. The group enlisted bassist Geezer Butler and vocalist Ozzy Osbourne, who had played together in a band called Rare Breed, Osbourne having placed an advertisement in a local music shop: "Ozzy Zig requires gig- has own PA". The new group was initially named The Polka Tulk Blues Company, after an Indian clothes emporium, and also featured slide guitarist Jimmy Phillips and saxophonist Alan "Aker" Clarke. After shortening the name to Polka Tulk, the band changed their name to Earth, and continued as a four-piece without Phillips and Clarke.

Earth played club shows in England, Denmark, and Germany; their set-list consisted of cover songs by Jimi Hendrix, Blue Cheer, and Cream, as well as lengthy improvised blues jams. In December 1968, Iommi abruptly left Earth to join Jethro Tull. Although his stint with the band would be short-lived, Iommi made an appearance with Jethro Tull on the The Rolling Stones Rock and Roll Circus TV show. Unsatisfied with the direction of Jethro Tull, Iommi returned to Earth in January 1969. "It just wasn't right, so I left", Iommi said. "At first I thought Tull were great, but I didn't much go for having a leader in the band, which was Ian Anderson's way. When I came back from Tull, I came back with a new attitude altogether. They taught me that to get on you got to work for it."

While playing shows in England in 1969, the band discovered they were being mistaken for another English group named Earth, and decided to change their name again. A movie theatre across the street from the band's rehearsal room was showing the 1963 Boris Karloff horror film Black Sabbath. While watching people line up to see the film, Butler noted that it was "strange that people spend so much money to see scary movies". Following that, Osbourne wrote the lyrics for a song called "Black Sabbath," which was inspired by the work of occult writer Dennis Wheatley, along with a vision that Butler had of a black-hooded figure standing at the foot of his bed. Making use of the musical tritone, also known as "The Devil's Interval", the song's ominous sound and dark lyrics pushed the band in a darker direction, a stark contrast to the popular music of the late 1960s, which was dominated by flower power, folk music, and hippie culture. Inspired by the new sound, the band changed their name to Black Sabbath in August 1969, and made the decision to focus on writing similar material, in an attempt to create the musical equivalent of horror films.

Black Sabbath and Paranoid (1970–1971)

Black Sabbath were signed to Philips Records in December 1969, and released their first single, "Evil Woman" through Philips subsidiary Fontana Records in January 1970. Later releases were handled by Philips' newly formed progressive rock label, Vertigo Records. Although the single failed to chart, the band were afforded two days of studio time in late January to record their debut album with producer Rodger Bain. Iommi recalls recording live: "We thought 'We have two days to do it and one of the days is mixing.' So we played live. Ozzy was singing at the same time, we just put him in a separate booth and off we went. We never had a second run of most of the stuff."

The eponymous Black Sabbath was released on Friday the 13th, February 1970. The album reached number 8 in the UK Albums Chart, and following its US release in May 1970 by Warner Bros. Records, the album reached number 23 on the Billboard 200, where it remained for over a year. While the album was a commercial success, it was widely panned by critics, with Lester Bangs of Rolling Stone dismissing the album as "discordant jams with bass and guitar reeling like velocitised speedfreaks all over each other's musical perimeters, yet never quite finding synch". It has since been certified platinum in both US by the Recording Industry Association of America (RIAA) and in the UK by British Phonographic Industry (BPI).

To capitalise on their chart success in the US, the band quickly returned to the studio in June 1970, just four months after Black Sabbath was released. The new album was initially set to be named War Pigs after the song "War Pigs", which was critical of the Vietnam War. However Warner changed the title of the album to Paranoid, fearing backlash by supporters of the Vietnam War. The album's lead-off single "Paranoid" was written in the studio at the last minute. As Bill Ward explains: "We didn't have enough songs for the album, and Tony just played the (Paranoid) guitar lick and that was it. It took twenty, twenty-five minutes from top to bottom." The single was released ahead of the album in September 1970 and reached number four on the UK charts, remaining Black Sabbath's only top ten hit.

Black Sabbath released their second full-length album, Paranoid in the UK in October 1970. Pushed by the success of the "Paranoid" single, the album hit number one in the UK. The US release was held until January 1971, as the Black Sabbath album was still on the charts at the time of Paranoid's UK release. The album broke into the top ten in the US in March 1971, and would go on to sell four million copies in the US, with virtually no radio airplay. The album was again panned by rock critics of the era, but modern-day reviewers such as AllMusic's Steve Huey cite Paranoid as "one of the greatest and most influential heavy metal albums of all time", which "defined the sound and style of heavy metal more than any other record in rock history". Paranoid's chart success allowed the band to tour the US for the first time in December 1970, which spawned the release of the album's second single "Iron Man". Although the single failed to reach the top 40, "Iron Man" remains one of Black Sabbath's most popular songs, as well as the bands highest charting US single until 1998's "Psycho Man".

Master of Reality and Volume 4 (1971–1973)

In February 1971, Black Sabbath returned to the studio to begin work on their third album. Following the chart success of Paranoid, the band were afforded more studio time, along with a "briefcase full of cash" to buy drugs. "We were getting into coke, bigtime", Ward explained. "Uppers, downers, Quaaludes, whatever you like. It got to the stage where you come up with ideas and forget them, because you were just so out of it."

Production completed in April 1971, and in July the band released Master of Reality, just six months after the release of Paranoid. The album reached the top ten in both the US and UK, and was certified gold in less than two months, eventually receiving platinum certification in the 1980s and Double Platinum in the early 21^st century. Master of Reality contained Black Sabbath's first acoustic songs, alongside fan favourites such as "Children of the Grave" and "Sweet Leaf". Critical response of the era was again unfavourable, with Lester Bangs of Rolling Stone dismissing Master of Reality as "naïve, simplistic, repetitive, absolute doggerel", although the very same magazine would later place the album at number 298 on their 500 Greatest Albums of All Time list, compiled in 2003.

Following the Master of Reality world tour in 1972, Black Sabbath took its first break in three years. As Bill Ward explained: "The band started to become very fatigued and very tired. We'd been on the road non-stop, year in and year out, constantly touring and recording. I think Master of Reality was kind of like the end of an era, the first three albums, and we decided to take our time with the next album."

In June 1972, the band reconvened in Los Angeles to begin work on their next album at the Record Plant. The recording process was plagued with problems, many as a result of substance abuse issues. While struggling to record the song "Cornucopia" after "sitting in the middle of the room, just doing drugs", Bill Ward was nearly fired from the band. "I hated the song, there were some patterns that were just... horrible" Ward said. "I nailed it in the end, but the reaction I got was the cold shoulder from everybody. It was like 'Well, just go home, you're not being of any use right now.' I felt like I'd blown it, I was about to get fired". The album was originally titled "Snowblind" after the song of the same name, which deals with cocaine abuse. The record company changed the title at the last minute to Black Sabbath Vol. 4, with Ward stating "There was no Volume 1, 2 or 3, so it's a pretty stupid title really".

Black Sabbath's Volume 4 was released in September 1972, and while critics of the era were again dismissive of the album, it achieved gold status in less than a month, and was the band's fourth consecutive release to sell a million copies in the US. With more time in the studio, Volume 4 saw the band starting to experiment with new textures, such as strings, piano, orchestration and multi-part songs. The song "Tomorrow's Dream" was released as a single—the band's first since Paranoid—but failed to chart. Following an extensive tour of the US, the band travelled to Australia for the first time in 1973, and later mainland Europe.

Sabbath Bloody Sabbath and Sabotage (1973–1976)

Following the Volume 4 world tour, Black Sabbath returned to Los Angeles to begin work on their next release. Pleased with the Volume 4 album, the band sought to recreate the recording atmosphere, and returned to the Record Plant studio in Los Angeles. With new musical innovations of the era, the band were surprised to find that the room they had used previously at the Record Plant was replaced by a "giant synthesiser". The band rented a house in Bel Air and began writing in the summer of 1973, but in part because of substance issues and fatigue, they were unable to complete any songs. "Ideas weren't coming out the way they were on Volume 4 and we really got discontent" Iommi said. "Everybody was sitting there waiting for me to come up with something. I just couldn't think of anything. And if I didn't come up with anything, nobody would do anything."

After a month in Los Angeles with no results, the band opted to return to England, where they rented Clearwell Castle in The Forest of Dean. "We rehearsed in the dungeons and it was really creepy but it had some atmosphere, it conjured up things, and stuff started coming out again". While working in the dungeon, Iommi stumbled onto the main riff of "Sabbath Bloody Sabbath", which set the tone for the new material. Recorded at Morgan Studios in London by Mike Butcher and building off the stylistic changes introduced on Volume 4, new songs incorporated synthesisers, strings, and complex arrangements. Yes keyboardist Rick Wakeman was brought in as a session player, appearing on "Sabbra Cadabra" .

In November 1973, Black Sabbath released the critically acclaimed Sabbath Bloody Sabbath. For the first time in their career, the band began to receive favourable reviews in the mainstream press, with Gordon Fletcher of Rolling Stone calling the album "an extraordinarily gripping affair", and "nothing less than a complete success". Later reviewers such as AllMusic's Eduardo Rivadavia cite the album as a "masterpiece, essential to any heavy metal collection," while also displaying "a newfound sense of finesse and maturity". The album marked the band's fifth consecutive platinum selling album in the US, reaching number four on the UK charts, and number eleven in the US. The band began a world tour in January 1974, which culminated at the California Jam festival in Ontario, California on 6 April 1974. Attracting over 200,000 fans, Black Sabbath appeared alongside such 70's pop giants as Emerson, Lake & Palmer, Deep Purple, Earth, Wind & Fire, Seals & Crofts, and Eagles. Portions of the show were telecast on ABC Television in the US, exposing the band to a wider American audience. In 1974, the band shifted management, signing with notorious English manager Don Arden. The move caused a contractual dispute with Black Sabbath's former management, and while on stage in the US, Osbourne was handed a subpoena that led to two years of litigation.

Black Sabbath began work on their sixth album in February 1975, again in England at Morgan Studios in Willesden, this time with a decisive vision to differ the sound from Sabbath, Bloody Sabbath. "We could've continued and gone on and on, getting more technical, using orchestras and everything else which we didn't particularly want to. We took a look at ourselves, and we wanted to do a rock album - Sabbath, Bloody Sabbath wasn't a rock album, really." Produced by Black Sabbath and Mike Butcher, Sabotage was released in July 1975. Again the album initially saw favourable reviews, with Rolling Stone stating "Sabotage is not only Black Sabbath's best record since Paranoid, it might be their best ever", although later reviewers such as Allmusic noted that "the magical chemistry that made such albums as Paranoid and Volume 4 so special was beginning to disintegrate".

Sabotage reached the top 20 in both the US and the UK, but was the band's first release not to achieve Platinum status in the US, having only achieving Gold certification. Although the album's only single "Am I Going Insane (Radio)" failed to chart, Sabotage features fan favourites such as "Hole in the Sky", and "Symptom of the Universe". Black Sabbath toured in support of Sabotage with openers Kiss, but were forced to cut the tour short in November 1975, following a motorcycle accident in which Osbourne ruptured a muscle in his back. In December 1975, the band's record companies released a greatest hits record without input from the band, titled We Sold Our Soul for Rock 'n' Roll. The album charted throughout 1976, eventually selling two million copies in the US.

Technical Ecstasy and Never Say Die! (1976–1979)

Black Sabbath began work for their next album at Criteria Studios in Miami, Florida, in June 1976. To expand their sound, the band added keyboard player Gerry Woodruffe, who also appeared to a lesser extent on Sabotage. Technical Ecstasy, released on 25 September 1976, was met with mixed reviews. For the first time the reviews did not become more favorable as time passed, two decades after its release AllMusic gave the album two stars, and noted that the band was "unravelling at an alarming rate". The album featured less of the doomy, ominous sound of previous efforts, and incorporated more synthesisers and uptempo rock songs. Technical Ecstasy failed to reach the top 50 in the US, and was the band's second consecutive release not to achieve platinum status, although it was later certified gold in 1997. The album included "Dirty Women", which remains a live staple, as well as Bill Ward's first lead vocal on the song "It's Alright". Touring in support of Technical Ecstasy began in November 1976, with openers Boston and Ted Nugent in the US, and completed in Europe with AC/DC in April 1977.

In November 1977, while in rehearsal for their next album, and just days before the band was set to enter the studio, Ozzy Osbourne quit the band. "The last Sabbath albums were just very depressing for me", Osbourne said. "I was doing it for the sake of what we could get out of the record company, just to get fat on beer and put a record out." Former Fleetwood Mac and Savoy Brown vocalist Dave Walker was brought into rehearsals in October 1977, and the band began working on new songs. Black Sabbath made their first and only appearance with Walker on vocals, playing an early version of the song "Junior's Eyes" on the BBC Television program "Look! Hear!".

Osbourne initially set out to form a solo project, which featured ex-Dirty Tricks members John Frazer-Binnie, Terry Horbury, and Andy Bierne. As the new band were in rehearsals in January 1978, Osbourne had a change of heart and rejoined Black Sabbath. "Three days before we were due to go into the studio, Ozzy wanted to come back to the band," Iommi explained. "He wouldn't sing any of the stuff we'd written with the other guy, so it made it very difficult. We went into the studio with basically no songs. We'd write in the morning so we could rehearse and record at night. It was so difficult, like a conveyor belt, because you couldn't get time to reflect on stuff. 'Is this right? Is this working properly?' It was very difficult for me to come up with the ideas and putting them together that quick."

The band spent five months at Sounds Interchange Studios in Toronto, Canada, writing and recording what would become Never Say Die!. "It took quite a long time," Iommi said. "We were getting really drugged out, doing a lot of dope. We'd go down to the sessions, and have to pack up because we were too stoned, we'd have to stop. Nobody could get anything right, we were all over the place, everybody's playing a different thing. We'd go back and sleep it off, and try again the next day." The album was released in September 1978, reaching number twelve in the UK, and number 69 in the US. Press response was again unfavourable and again did not improve over time with Eduardo Rivadavia of AllMusic stating two decades after its release that the album's "unfocused songs perfectly reflected the band's tense personnel problems and drug abuse." The album featured the singles "Never Say Die" and "Hard Road", both of which cracked the top 40 in the UK, and the band made their second appearance on the Top of the Pops, performing "Never Say Die". It took nearly 20 years for the album to be certified Gold in the US.

Touring in support of Never Say Die! began in May 1978 with openers Van Halen. Reviewers called Black Sabbath's performance "tired and uninspired", a stark contrast to the "youthful" performance of Van Halen, who were touring the world for the first time. The band filmed a performance at the Hammersmith Odeon in June 1978, which was later released on DVD as Never Say Die. The final show of the tour, and Osbourne's last appearance with the band (until later reunions) was in Albuquerque, New Mexico on 11 December.

Following the tour, Black Sabbath returned to Los Angeles and again rented a house in Bel Air, where they spent nearly a year working on material for the next album. With pressure from the record label, and frustrations with Osbourne's lack of ideas coming to a head, Tony made the decision to fire Ozzy Osbourne in 1979. "At that time, Ozzy had come to an end", Iommi said. "We were all doing a lot of drugs, a lot of coke, a lot of everything, and Ozzy was getting drunk so much at the time. We were supposed to be rehearsing and nothing was happening. It was like 'Rehearse today? No, we'll do it tomorrow.' It really got so bad that we didn't do anything. It just fizzled out." Drummer Bill Ward, who was close with Osbourne, was chosen by Tony to break the news to the singer. "I hope I was professional, I might not have been, actually. When I'm drunk I am horrible, I am horrid," Ward said. "Alcohol was definitely one of the most damaging things to Black Sabbath. We were destined to destroy each other. The band were toxic, very toxic."

Heaven and Hell and Mob Rules (1979–1982)

Sharon Arden, (later Sharon Osbourne) daughter of Black Sabbath manager Don Arden, suggested former Rainbow vocalist Ronnie James Dio to replace Ozzy Osbourne in 1979. Dio officially joined in June, and the band began writing their next album. With a notably different vocal style from Osbourne's, Dio's addition to the band marked a change in Black Sabbath's sound. "They were totally different altogether", Iommi explains. "Not only voice-wise, but attitude-wise. Ozzy was a great showman, but when Dio came in, it was a different attitude, a different voice and a different musical approach, as far as vocals. Dio would sing across the riff, whereas Ozzy would follow the riff, like in "Iron Man". Ronnie came in and gave us another angle on writing."

Geezer Butler temporarily left the band in September 1979, and was initially replaced by Geoff Nicholls of Quartz on bass. The new lineup returned to Criteria Studios in November to begin recording work, with Butler returning to the band in January 1980, and Nicholls moving to keyboards. Produced by Martin Birch, Heaven and Hell, was released on 25 April 1980, to critical acclaim. Over a decade after its release AllMusic said the album was "one of Sabbath's finest records, the band sounds reborn and re-energised throughout". Heaven and Hell peaked at number 9 in the UK, and number 28 in the US, the band's highest charting album since Sabotage. The album eventually sold a million copies in the US, and the band embarked on an extensive world tour, making their first live appearance with Dio in Germany on April 17, 1980.

Black Sabbath toured the US throughout 1980 with Blue Öyster Cult on the "Black and Blue" tour, with a show at Nassau Coliseum in Uniondale, New York filmed and released theatrically in 1981 as Black and Blue. On 26 July 1980, the band played to 75,000 fans at a sold-out Memorial Coliseum in Los Angeles with Journey, Cheap Trick, and Molly Hatchet. The next day, the band appeared at the 1980 Day on the Green at Oakland Coliseum. While on tour, Black Sabbath's former label in England issued a live album culled from a seven-year old performance, entitled Live at Last without any input from the band. The album reached number five on the British charts, and saw the re-release of "Paranoid" as a single, which reached the top 20.

On 18 August 1980, after a show in Minneapolis, Minnesota, Bill Ward was fired from Black Sabbath. "I was sinking very quickly", Ward later said. "I was an unbelievable drunk, I was drunk twenty-four hours a day. When I went on stage, the stage wasn't so bright. It felt like I was dying inside. The live show seemed so bare, Ron was out there doing his thing and I just went 'It's gone'. I like Ronnie, but musically, he just wasn't for me." Concerned with Ward's declining health, Iommi brought in drummer Vinny Appice, without informing Ward. "They didn't talk to me, they booted me from my chair and I wasn't told about that. I knew they'd have to bring in a drummer to save the (tour), but I'd been with the band for years and years, since we were kids. And then Vinny was playing and it was like 'What the fuck?' It hurt a lot."

The band completed the Heaven and Hell world tour in February 1981, and returned to the studio to begin work on their next album. Black Sabbath's second studio album produced by Martin Birch and featuring Ronnie James Dio as vocalist, Mob Rules was released in October 1981, to be well received by fans, but less so by the critics. Rolling Stone reviewer J. D. Considine gave the album one star, claiming "Mob Rules finds the band as dull-witted and flatulent as ever". Like most of the band's earlier work, time helped to improve the opinions of the music press, a decade after its release, AllMusic's Eduardo Rivadavia called Mob Rules "a magnificent record". The album was certified gold, and reached the top 20 on the UK charts. The album's title track "The Mob Rules", which was recorded at John Lennon's old house in England, also featured in the 1981 animated film Heavy Metal, although the film version is an alternate take, and differs from the album version.

Unhappy with the quality of 1980's Live at Last, the band recorded another live album—titled Live Evil—during the Mob Rules world tour, across the United States in Dallas, San Antonio, and Seattle, in 1982. During the mixing process for the album, Iommi and Butler had a falling out with Dio. Iommi and Butler accused Dio of sneaking into the studio at night to raise the volume of his vocals. In addition, Dio was not satisfied with the pictures of him in the artwork. "Ronnie wanted more say in things," Iommi said. "And Geezer would get upset with him and that is where the rot set in. Live Evil is when it all fell apart. Ronnie wanted to do more of his own thing, and the engineer we were using at the time in the studio didn't know what to do, because Ronnie was telling him one thing and we were telling him another. At the end of the day, we just said, 'That's it, the band is over'". "When it comes time for the vocal, nobody tells me what to do. Nobody! Because they're not as good as me, so I do what I want to do," Dio later said. "I refuse to listen to Live Evil, because there are too many problems. If you look at the credits, the vocals and drums are listed off to the side. Open up the album and see how many pictures there are of Tony, and how many there are of me and Vinny".

Ronnie James Dio left Black Sabbath in November 1982 to start his own band, and took drummer Vinny Appice with him. Live Evil was released in January 1983, but was overshadowed by Ozzy Osbourne's Speak of the Devil, a platinum selling live album that contained only Black Sabbath songs, released five months earlier.

Born Again (1983–1984)

Left with just two original members, Tony Iommi and Geezer Butler began auditioning new singers for the band's next release. After failed attempts with the likes of Whitesnake's David Coverdale, Samson's Nicky Moore, and Lone Star's John Sloman, the band settled on former Deep Purple vocalist Ian Gillan to replace Ronnie James Dio in 1983. While the project was not initially set to be called Black Sabbath, pressures from the record label forced the group to retain the name. The band entered The Manor Studios in Shipton-on-Cherwell, Oxfordshire, England, in June 1983 with a returned and newly sober Bill Ward on drums. Born Again was met with mixed reviews from fans and critics alike. The album reached number four on the UK charts, and number 39 in the US. However, even a decade after its release AllMusic's Eduardo Rivadavia called the album "dreadful", noting that "Gillan's bluesy style and humorous lyrics were completely incompatible with the lords of doom and gloom".

Although he performed on the album, drummer Bill Ward was unable to tour because of the pressures of the road, and quit the band in 1984. "I fell apart with the idea of touring," Ward later said. "I got so much fear behind touring, I didn’t talk about the fear, I drank behind the fear instead and that was a big mistake." Ward was replaced by former Electric Light Orchestra drummer Bev Bevan for the Born Again world tour, which began in Europe with Diamond Head, and later in the US with Quiet Riot and Night Ranger. The band headlined the 1983 Reading Festival, adding the Deep Purple song "Smoke on the Water" to their set list.

The tour in support of Born Again included a giant set of the Stonehenge monument. In a move that would be later parodied in the mockumentary This Is Spinal Tap, the band made a mistake in ordering the set piece. As Geezer Butler later explained:

We had Sharon Osbourne's dad, Don Arden, managing us. He came up with the idea of having the stage set be Stonehenge. He wrote the dimensions down and gave it to our tour manager. He wrote it down in meters but he meant to write it down in feet. The people who made it saw fifteen meters instead of fifteen feet. It was 45 feet high and it wouldn't fit on any stage anywhere so we just had to leave it in the storage area. It cost a fortune to make but there was not a building on earth that you could fit it into.

Hiatus and Seventh Star (1984–1986)

Following the completion of the Born Again tour in March 1984, vocalist Ian Gillan left Black Sabbath to re-join Deep Purple. The band enlisted Los Angeles vocalist David Donato. The new lineup wrote and rehearsed throughout 1984, and eventually recorded a demo with producer Bob Ezrin in October. Unhappy with the results, the band parted ways with Donato shortly after. Disillusioned with the band's revolving lineup, bassist Geezer Butler quit Black Sabbath in November 1984 to form a solo band. "When Ian Gillan took over that was the end of it for me", Butler later said. "I thought it was just a joke and I just totally left. When we got together with Gillan it was not supposed to be a Black Sabbath album. After we had done the album we gave it to Warner Bros. and they said they were going to put it out as a Black Sabbath album and we didn’t have a leg to stand on. I got really disillusioned with it and Gillan was really pissed off about it. That lasted one album and one tour and then that was it."

Following Butler's exit, sole remaining original member Tony Iommi put Black Sabbath on hiatus, and began work on a solo album with keyboardist Geoff Nicholls. While working on new material, the original Black Sabbath lineup were offered a spot at Bob Geldof's Live Aid benefit concert; the band agreed, performing at the Philadelphia show, on 13 July 1985. The event marked the first time the original lineup appeared on stage since 1978, and also featured reunions of The Who and Led Zeppelin. Returning to his solo work, Iommi enlisted bassist Dave Spitz and drummer Eric Singer, and initially intended to use multiple singers, including Rob Halford of Judas Priest, ex-Deep Purple and Trapeze vocalist Glenn Hughes, and ex-Black Sabbath vocalist Ronnie James Dio. "We were going to use different vocalists on the album, guest vocalists, but it was so difficult getting it together and getting releases from their record companies. Glenn Hughes came along to sing on one track and we decided to use him on the whole album."

The band spent the remainder of the year in the studio, recording what would become Seventh Star. Warner Bros. refused to release the album as a Tony Iommi solo release, instead insisting on using the name Black Sabbath. Pressured by the band's manager, Don Arden, the two compromised and released the album as "Black Sabbath featuring Tony Iommi" in January 1986. "It opened up a whole can of worms really," Iommi explained, "because I think if we could have done it as a solo album, it would have been accepted a lot more." Seventh Star, which sounded little like a Black Sabbath album, incorporated more hard rock elements popularised by the 1980s Sunset Strip hard rock scene, and was panned by the critics of the era, although later reviewers such as AllMusic gave the album favourable reviews, calling the album "often misunderstood and underrated".

The new lineup rehearsed for six weeks, preparing for a full world tour, although the band were again forced to use the Black Sabbath name. "I was into the 'Tony Iommi project', but I wasn't into the Black Sabbath moniker," Hughes said. "The idea of being in Black Sabbath didn't appeal to me whatsoever. Glenn Hughes singing in Black Sabbath is like James Brown singing in Metallica. It wasn't gonna work". Just four days before the start of the tour, vocalist Glenn Hughes got into a bar fight with the band's production manager John Downing which splintered the singer's orbital bone. The injury interfered with Hughes' ability to sing, and the band brought in vocalist Ray Gillen to continue the tour with W.A.S.P. and Anthrax, although nearly half of the US dates would eventually be cancelled because of poor ticket sales.

One vocalist whose status is disputed, both inside and outside Black Sabbath, is Christian evangelist Jeff Fenholt. He has insisted that he was a singer in Black Sabbath between January and May 1985. Tony Iommi has never confirmed this, as he was working on a solo release that was later named as a Sabbath album. Fenholt gives a detailed account of his time with Iommi and Sabbath in Garry Sharpe-Young's book Sabbath Bloody Sabbath: The Battle for Black Sabbath.

The Eternal Idol, Headless Cross, and Tyr (1986–1990)

Black Sabbath began work on new material in October 1986 at Air Studios in Montserrat with producer Jeff Glixman. The recording was wrought with problems from the beginning, as Glixman left after the initial sessions, and was replaced by producer Vic Coppersmith-Heaven. Bassist Dave Spitz quit over "personal issues", and ex-Rainbow bassist Bob Daisley was brought in. Daisley re-recorded all of the bass tracks, and wrote the album's lyrics, but before the album was complete, he left to join Gary Moore's solo band, taking drummer Eric Singer with him. After problems with second producer Coppersmith-Heaven, the band returned to Morgan Studios in England in January 1987 to work with new producer Chris Tsangarides. While working in the UK, new vocalist Ray Gillen abruptly left Black Sabbath to form Blue Murder with John Sykes. The band enlisted ex-Alliance vocalist Tony Martin to re-record Gillen's tracks, and former drummer Bev Bevan to complete a few percussion overdubs. Before the release of the new album, Black Sabbath accepted an offer to play six shows at Sun City, South Africa during the apartheid era. The band drew criticism from activists and artists involved with Artists United Against Apartheid, who had been boycotting South Africa since 1985. Drummer Bev Bevan refused to play the shows, and was replaced by Terry Chimes, formerly of The Clash.

After nearly a year in production, The Eternal Idol was released on 8 December 1987 and ignored by contemporary reviewers. On-line internet era reviews were mixed. AllMusic said that "Martin's powerful voice added new fire" to the band, and the album contained "some of Iommi's heaviest riffs in years." Blender gave the album two stars, claiming the album was "Black Sabbath in name only". The album would stall at #66 in the UK, while peaking at 168 in the US. The band toured in support of Eternal Idol in Germany, Italy and for the first time, Greece. Unfortunately, in part because of a backlash from promoters over the South Africa incident, other European shows were cancelled. Bassist Dave Spitz left the band shortly before the tour, and was replaced by Jo Burt, formerly of Virginia Wolf.

Following the poor commercial performance of Eternal Idol, Black Sabbath were dropped by Vertigo Records and Warner Bros. Records, and signed with I.R.S. Records. The band took time off in 1988, returning in August to begin work on their next album. As a result of the recording troubles with Eternal Idol, Tony Iommi opted to produce the band's next album himself. "It was a completely new start", Iommi said. "I had to rethink the whole thing, and decided that we needed to build up some credibility again". Iommi enlisted ex-Rainbow drummer Cozy Powell, long-time keyboardist Nicholls and session bassist Laurence Cottle, and rented a "very cheap studio in England".

Black Sabbath released Headless Cross in April 1989, and again ignored by contemporary reviewers. Eventually, AllMusic would give the album four stars, calling Headless Cross "the finest non-Ozzy or Dio Black Sabbath album". Anchored by the number 62 charting single "Headless Cross", the album reached number 31 on the UK charts, and number 115 in the US. Queen guitarist Brian May, a friend of Iommi's, played a guest solo on the song "When Death Calls". Following the album's release, the band added touring bassist Neil Murray, formerly of Whitesnake.

The ill-fated Headless Cross US tour began in May 1989 with openers Kingdom Come and Silent Rage, but because of poor ticket sales, the tour was cancelled after just eight shows. The European leg of the tour began in September, where the band were enjoying chart success. After a string of Japanese shows, the band embarked on a 23 date Russian tour with Girlschool. Black Sabbath was one of the first bands to tour Russia, after Mikhail Gorbachov opened the country to western acts for the first time in 1989.

The band returned to the studio in February 1990 to record Tyr, the follow-up to Headless Cross. While not technically a concept album, some of the album's lyrical themes are loosely based on Norse mythology. Tyr was released on 6 August 1990, and reached number 24 on the UK albums chart, but was the first Black Sabbath release not to break the Billboard 200 in the US. The album again would receive mixed internet-era reviews, with AllMusic noting that the band "mix myth with metal in a crushing display of musical synthesis," while Blender gave the album just one star, claiming that "Iommi continues to besmirch the Sabbath name with this unremarkable collection". The band toured in support of Tyr with Circus of Power in Europe, but the final seven UK dates were cancelled because of poor ticket sales. For the first time in their career, the band's touring cycle did not include US dates.

Dehumanizer (1990–1993)

While on his own Lock Up The Wolves US tour in August 1990, former Black Sabbath vocalist Ronnie James Dio was joined on stage at the Minneapolis Forum by former Black Sabbath bassist Geezer Butler to perform "Neon Knights". Following the show, the two expressed interest in rejoining Black Sabbath. Butler convinced Iommi, who in turn broke up the current lineup, 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".

Ronnie James Dio and Geezer Butler joined Tony Iommi and Cozy Powell in the fall of 1990 to begin working on the next Black Sabbath release. While rehearsing in November, Powell suffered a broken hip when his horse died, falling on the drummer's legs. Unable to complete work on the album, Powell was replaced by former drummer Vinny Appice, and the band entered the studio with producer Reinhold Mack. The year-long recording process was plagued with problems, primarily stemming from writing tension between Tony Iommi and Ronnie James Dio, as some songs were re-written multiple times. "Dehumanizer took a long time, it was just hard work", Iommi said. "We took too long on it, that album cost us a million dollars, which is bloody ridiculous". Dio later 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", he said. "Sometimes you need that kind of tension, or else you end up making the Christmas album".

The resulting album,