On their second album, Denver sludge trio Primitive Man ply their hellish trade with ruthless efficiency: Churning, detuned riffs, battery-acid vocals, and waves of shrieking feedback coalesce into a blackened vortex that threatens to destroy minds and reap souls. With track lengths running from under a minute to well over 12, the band explores the full spectrum of brutality and endurance. Harsh, bitter, and terrifying, Caustic lives up to its name in every possible way.