2013 release from the Texas-based Hardcore Metal band. It's been nearly four years since the last Mammoth Grinder full-length, Extinction of Humanity, was released. Now, after a long wait and much anticipation, Mammoth Grinder has found a home on 20 Buck Spin for the release of their wildly destructive third full-length Underworlds. The album marks a peak at which Mammoth Grinder have sharpened and perfected their sound into a seething Grind/Death/Thrash maelstrom of intense degree. Unrelenting in concentrated raw precision and focused power, Underworlds careens violently through ten tracks with effortless versatility and the fixated song craft expected of a band on their third record.