Judas Priest is working on a cover of Black Sabbath’s “War Pigs” that will feature vocals from Ozzy Osbourne, who died in July .

Lead singer Rob Halford detailed the process of recording the duet during a recent episode of the “Full Metal Jackie” podcast.

“Ozzy’s singing a line and then I’m singing a line, and Ozzy’s singing a line and I’m singing a line,” Halford said. “It’s the first ever time in my entire life that I’ve been able to do a duet with Ozzy and I’m so eternally grateful and blessed that I was able to do that.”

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Judas Priest has covered the song live throughout the band’s career. Their rendition caught the attention of Osbourne’s wife and manager, Sharon, who came up with the idea

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