'Blood Spiller' was written in response to several events that occurred in 2020. Additionally, the album has been noted as having a strong grunge influence and 'employing a wide-ranging amalgam of brooding post-grunge and ' Creeping Death'-era Metallica thrash'. Nicholas Senior of New Noise Magazine described the album as stoner metal, comparing it to Red Fang. Revolver described lead single and opening track 'New Reality' as leaning 'into the quartet's sludgier inclinations.' Jon Hadusek from Consequence referred to the song's riff as 'heavy sludge and stoner metal.' Second single, 'Blinded by a Blaze', has been described as post-metal. Additionally, 'Amaranthine' features lyrics that were written by Scofield.

'New Reality' features a riff that was written by late bassist/vocalist Caleb Scofield in 2011. The album was produced by Converge guitarist Kurt Ballou, who produced Cave In's debut Until Your Heart Stops. The fourth single, 'Reckoning', was released on May 10 the song was written entirely by guitarist Adam McGrath. The album's third single, 'Blood Spiller', was released on April 26. The album's second single, 'Blinded by a Blaze', was released on April 5. The album's title was revealed as Heavy Pendulum with the release of the single 'New Reality' on March 15, 2022. In July 2021, Cave In signed to Relapse Records and announced its seventh studio album will be released through the label. This is the band's first album with bassist/backing vocalist Nate Newton, though late bassist/vocalist Caleb Scofield still has a presence on the record.

Heavy Pendulum is the seventh studio album by American rock band Cave In, released on through Relapse Records.

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