PERVERSION initiated rehearsal sessions in a basement of Detroit around the fall of 2008. If "archaic death metal" indeed aptly described PERVERSION previously, here they shatter that definition with an utterly ultraviolent assault on the senses. Swirling malevolently in a cauldron brewed from the darkest depths of old Brazilian proto-death, earliest German thrash, bestial detonations at the dawn of the '90s, and even '80s grindcore, PERVERSION proceed to lay waste across the album's seven central tracks, plus ominous intro and an album-closing cover of Bathory's "Possessed." That the power-trio prize songwriting amidst their barbaric onslaught puts PERVERSION in a unique realm, and one truly within that of the archaic. With chaotic-yet-composed solos flying fast and free and rough-yet-robust production heightening that sense of the diabolical, Dies Irae is maniacal black/death for true black/death maniacs.