Heaven & Hell was a British-American heavy metal supergroup that was active from 2006 to 2010. The band was essentially a continuation of Black Sabbath, featuring the same line-up of members – Tony Iommi, Geezer Butler, Ronnie James Dio, and Vinny Appice. They are known for their heavy, riff-driven sound, Dio's powerful vocals, and lyrics often dealing with dark and supernatural themes. The band's only studio album, "The Devil You Know," solidified their place in metal history, showcasing their signature blend of doom and classic metal styles.