"Fuck off! You're not marrying my daughter," Ozzy joked
The musician popped up on the big screen to share a personal message to the band during the all-day event
Black appears alongside the children of Tom Morello and Scott Ian in the video
Ozzy Osbourne, Tony Iommi, Geezer Butler and Bill Ward reunited for their last performance yesterday (July 5)
"Thank you from the bottom of our hearts"
"It's so good to be on this fucking stage, you have no idea"
The all-star team played 'Train Kept A-Rollin', 'Walk This Way' and 'Whole Lotta Love'
He was joined by Sleep Token's II, Extreme's Nuno Bettencourt and Adam Wakeman of Ozzy Osbourne's band
The band were reportedly practising a rendition of one of the metal pioneers’ hits before one of their live shows
The guitarist also admitted that he is experiencing nerves before tomorrow’s massive gig