After plunging the deep seas (and the tomes of Moby Dick) and climbing the Blood Mountain, Mastodon’s most recent cosmic exploration, Crack the Skye, just may have surpassed its own dense and epic bar of forward-thinking post-metal. Better vocals make the already dexterous riffage that much more juicy. And what a bill: The badass proto-black/enduro-stoner mayhem of High on Fire and the crushing, pit-storm of metalcore godfathers Converge, who’ll be firing on all cannons with tracks from their just released career high, Axe To Fall. With Dethklok.
Thu., Oct. 29, 6:30 p.m.; Fri., Oct. 30, 6:30 p.m., 2009