Quoc: Ozzy Osbourne -- vocals, harmonica Tony Iommi -- guitar, slide guitar Geezer Butler -- bass Bill Ward -- drums\n\nAnswer this question: who played harmonica on the wizard black sabbath?
HW Chung: OK, some thoughts:
User
This is the relevant information: Ozzy Osbourne -- vocals, harmonica The answer is Ozzy Osbourne.
Assistant