Last October, Jack Black starred in Electronic Arts' Brutal Legend as protagonist Eddie Riggs. This year, at BlizzCon 2010, Black will perform under the banner of Blizzard.

As Black would say, "These people are about to have their faces melted."

Blizzard today sent word that rock group Tenacious D, a band composed of Jack Black and Kyle Gass, will perform at this year's BlizzCon during the closing ceremony on October 23. The band is known for its HBO show Tenacious D: The Greatest Band on Earth, as well as its two albums, live concert DVDs, and feature film Tenacious D in the Pick of Destiny. According to Blizzard, Tenacious D will debut new songs during their set.

As in years past, BlizzCon will feature a variety of activities catering to the tastes of Warcraft, Starcraft, and Diablo fans. Those in attendance will be able to play prerelease builds of Blizzard's upcoming games, including World of Warcraft: Cataclysm and Diablo III. The show will also include a variety of panels form Blizzard developers, casual and competitive tournaments, contests, a silent auction, and a merchandise store.

Some 20,000 tickets were sold at $125 a pop to BlizzCon 2009, though Blizzard has said that the event remains unprofitable. Highlights included the announcement of WOW's third expansion, Cataclysm, as well as a live performance by metal maestro Ozzy Osbourne, whom GameSpot spoke with after the show.

BlizzCon 2010 will be held October 22-23 at the Anaheim Convention Center in California. The event is sold out, but those interested in the latest Blizzard news can purchase a BlizzCon 2010 Virtual Ticket for $39.95 to watch more than 50 hours of content from the event.