This year at BlizzCon 2009, attendees will be entertained by none other than heavy metal's "Prince of Darkness" Ozzy Osbourne. Will he bite the head off of a cockatrice before performing? We can only hope.

Ozzy Osbourne's "special appearance" was revealed through a DirecTV listing. DirecTV is offering live footage of the event to subscribers for $40. Any mention of Osbourne in the >listing has since been scrubbed.

It wouldn't be the first time Ozzy has crossed paths with Blizzard. Last year Osbourne he starred in a World of Warcraft commercial, posted below.