The group reunited for a handful of shows last year (12) and announced plans to release a 2013 album of new material, and they have been busy in the studio in recent months.
They released a new YouTube.com video of their studio sessions this week (begs11Feb13), and Britain's The Sun newspaper reports reality Tv star-turned-filmmaker Jack Osbourne is the brains behind the clip.
Speaking about the new material in the video, Ozzy says, "This new Black Sabbath album is quite possibly the most important album of my career.
"I want it to sound current but still have that Sabbath vibe. I make an album that I like and then if someone else likes it - great."
Jack Osbourne has previously recorded his father for 2011 documentary God Bless Ozzy Osbourne.