Per Flagellum Sanguemque, Tenebras Veneramus--roughly translated, "with blood and whip, we worship the dark"--collects the latest atrocities from Gnaw Their Tongues, an eight-song exploration of the copper-scented frenzy of the serial killer, the obsessive acts of death worship enacted by those who live on the edge of abyss, the rites and rituals of black cults. As always, the sound is immensely heavy--a seething maelstrom of thunderous tympani, screeching classical strings, horns, piano and some of the most vomitous vocals imaginable. However, Per Flagellum Sanguemque is marked by the most frenetic percussive attack heard from Gnaw Their Tongues yet, with volleys of chaotic drumming, fractured blasts and maniacally complex patterns that border on free-jazz.