Ronnie James Dio, Tony Iommi, Geezer Butler and Vinny Appice will reunite for the first time in 15 years as Heaven and Hell Live to cast a dark spell over spring as the quartet tours the U.S.

Last year, the hard-rocking quartet convened to record three new songs for Rhino Records' era-spanning collection, Black Sabbath: The Dio Years. One of the newly recorded tracks - 'The Devil Cried' - is the first single. Bristling with the trademark Sabbath sound, the song is being well received by fans and critics alike.

The sessions for Black Sabbath: The Dio Years went so well that the band agreed to satisfy longstanding demands for a reunion tour. Set to launch in Canada on March 11, the Heaven And Hell World Tour will spotlight Dio's tenure with Sabbath and will feature selections from all three of the group's the studio albums, Heaven And Hell (1980), Mob Rules (1981) and Dehumanizer (1992), as well as the newly recorded tracks.

Multi-platinum recording artist Megadeth will join the tour and preview never before heard material from the group's new CD, United Abominations, due out May 8 on Roadrunner Records. All dates will also feature Roadrunner labelmates Machine Head who are supporting their latest album, The Blackening.