stylistic:style_transfer
1973–1976: Sabbath Bloody Sabbath and Sabotage

Following the Vol. 4 world tour, Black Sabbath returned to Los Angeles to begin work on their next release. Pleased with the Vol. 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 Vol. 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. 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 Vol. 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 began to receive positive reviews in the mainstream press after the release of Sabbath Bloody Sabbath, 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 U.S., reaching number four on the UK Albums Chart and number 11 in the U.S.

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 popular 1970s rock and pop bands Deep Purple, Eagles, Emerson, Lake & Palmer, Rare Earth, Seals & Crofts, Black Oak Arkansas and Earth, Wind & Fire. Portions of the show were telecast on ABC Television in the U.S., exposing the band to a wider American audience. In the same year, 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 U.S., 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. As with its precursor, 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 U.S. and the United Kingdom, but was the band's first release not to achieve Platinum status in the U.S., 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 album 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 U.S.