Over more than three decades, Germany's Pyogenesis have been a constant source of musical evolution. Though they began as death metal outfit Immortal Hate, celebrating gore-drenched violence during the late '80s, they shifted gears almost immediately. Three EPs issued during the early '90s --including the acclaimed 1992 offering Ignis Creatio -- reveled in the esoteric no man's land between doom and death metal. 1995's Sweet X-Rated Nothings was originally thought by fans to be a joke with its hooky alt-metal riffs, sampled porn dialogue, sweet vocal harmonies, and breakbeats!...