Led by Power Trip drummer Chris Ulsh on bass and vocals, Mammoth Grinder pound out thundering death metal with a feverish punk attitude. For the band's fourth album, Ulsh enlists the talents of Iron Reagan members Ryan Parrish (drums) and Mark Bronzino (guitars), who bring unbridled fury and ripping riffs to the likes of "Grimmenstein", "Blazing Burst" and "Locust's Nest". The power trio slow things down—briefly—on the churning "Human Is Obsolete" and the doom-laden "Mysticism" before kicking back into maximum overdrive.