<P> But soon, JB and KG come back together when they realize they need each other as friends . The two manage to steal the Pick of Destiny due to incompetent security at the rock museum . Armed with this supernatural pick, they plan to use the winnings from a local bar's talent contest to pay their rent, but before they can go on stage, they argue over who gets to use the pick first, snapping it in half accidentally . After a pep - talk from the bar's owner, they decide they are good enough to go onto the contest without the pick, not knowing that the owner is Satan in human form, looking for his missing tooth piece . Coming back outside (deciding they can both use half of the pick), they are confronted by Satan, who is "complete" when he places the Pick of Destiny back on his broken tooth, giving him the ability to use his supernatural powers on Earth . He threatens to make Tenacious D his first victim . </P> <P> To save their lives, Tenacious D challenge Satan to a "rock - off", which he cannot deny, as the "demon code" strictly forbids him from declining such a challenge . As the bargain goes, if Tenacious D wins, Satan must return to hell on his own and pay their rent . But if Satan wins, he gets to take KG back with him as a sex slave . Ultimately, they lose (KG sings, "That was a masterpiece! / He rocks too hard because he's not a mortal man ."), and Satan attempts to shoot KG with a bolt of energy . JB jumps in the way, and the bolt bounces off his guitar, blowing off a piece of Satan's horn . JB is able to send him back to Hell with a magical incantation . (As explained earlier, should Satan become "incomplete", he can be banished from the Earth with said incantation .) </P> <P> The two turn Satan's horn into the "Bong of Destiny" and the movie closes with the two smoking from it as they write new songs . </P> <Ul> <Li> Jack Black as Jack "Jables / JB" Black <Ul> <Li> Troy Gentile as young JB </Li> </Ul> </Li> <Li> Kyle Gass as Kyle "Kage / KG" Gass </Li> <Li> JR Reed as Lee </Li> <Li> Ronnie James Dio as himself </Li> <Li> Dave Grohl as Satan </Li> <Li> Ben Stiller as Guitar Center Guy </Li> <Li> Paul F. Tompkins as Open Mic Host </Li> <Li> Tim Robbins as The Stranger </Li> <Li> John C. Reilly as Sasquatch </Li> <Li> Meat Loaf as Bud Black </Li> <Li> Cynthia Ettinger as Betty Black </Li> <Li> Andrew Caldwell as Billy Black </Li> <Li> Amy Poehler as Truck Stop Waitress </Li> <Li> Colin Hanks as Drunk Frat Dude </Li> <Li> Amy Adams as Gorgeous Woman </Li> <Li> Gregg Turkington as Stand Up Comic (credited as Neil Hamburger) </Li> <Li> Evie Peck as KG's Mother </Li> <Li> Jason Segel as Frat Boy #1 </Li> <Li> David Krumholtz as Frat Boy #2 </Li> <Li> Fred Armisen as Security Guard #1 </Li> <Li> Ned Bellamy as Security Guard #2 </Li> <Li> Jay Johnston as Gang Member #1 </Li> <Li> John Ennis as Gang Member #2 </Li> <Li> David Koechner as Surplus Store Clerk (deleted scene) </Li> </Ul>

Tenacious d - the pick of destiny ending (beelzeboss)