'Anxious Ghosts' is intense exploration of rumbling, moody soundscapes
Single is "a clarion call of warning to the crust-fisted oppressor," says vocalist Jared Warren
King Buzzo and Co. put sludgy, noisy spin on grunge classic
Soundgarden, Temple of the Dog, Audioslave members also performed at all-star concert
Boy Harsher, Slipknot, City Hunter and more
King Buzzo and Co. expand on original's conceptual weirdness with heavier keyboards and warped guitars
Supergroup featuring members of Dragonforce, Mayhem and more update sludge classic
Guitarist demonstrates how to play "Hooch," "Honey Bucket," "Copache"
Sludge/doom titans unite for droning, slowed-down take on "Sabbath Bloody Sabbath"