After a six-year hiatus, Tenacious D — the comedy-meets-hard-rock band made up of Jack Black and Kyle Gass — will be hitting the road this summer in support of the upcoming album “Rize of the Fenix.” And to prove that they’re up for the task, Black and Gass have released a new video of their training regimen, “To Be the Best.”

Kyle Gass, left, and Jack Black of Tenacious D perform at Haven during SXSW on March 15. (Jay Janner/AP/Austin American-Statesman)

With cameos from Maria Menounos, Val Kilmer, Dave Grohl and Jimmy Kimmel, Black and Gass catch us up to what they’ve been doing the past six years (Black: Super-stardom and general awesomeness; Gass: “mental institution”). They embark on a “Rocky”-style training regimen, shredding on guitars and flying on bald eagles. The result? “The greatest album recorded by anyone, ever,” according to Menounos.

“Rize of the Fenix” will be released May 15, and can be pre-ordered. Tickets for a summer tour (no dates in D.C., sorry locals) will be released Friday.

What’s in store for concert-goers? The last time Tenacious D came to D.C. — in 2006, in support of “The Pick of Destiny” — critic Chris Klimek described the scene:

Parody is the sincerest form of flattery. No surprise, then, that the devil-sign-flashing hordes who (nearly) packed the Patriot Center on Sunday night to hail the return of Tenacious D acted as though they were at — forgive me — an "unironic" heavy-metal show.

But true entertainment needs no quotation marks, and all present witnessed a grand night of Spinal Tap-esque bombast. ... Brandishing acoustic guitars like broadswords and singing artfully profane tales of dragons slain and wenches ravished, [Tenacious D] at once skewer and venerate the Iron Maidens and Judas Priests of the world.