The name of Lemmy Kilmister duet with Ozzy osbourne?

The song in which Lemmy Kilmister duets with Ozzy Osbourne is called "Hellraiser." It is the title track of Ozzy Osbourne's 1991 album of the same name. The song was written by Ozzy Osbourne, Zakk Wylde, and Lemmy Kilmister, and it features Kilmister on lead vocals for the verses and Osbourne on lead vocals for the chorus.