On Tyranny and Mutation, Blue Oyster Cult achieved the seemingly impossible: they brightened their sound and deepened their mystique. The band picked up their tempos considerably on this sophomore effort. The split imagery of Side One's thematic, "The Red" and Side Two's "The Black," and the flip-to-wig-city, dark conspiracy of Gawlik's cover art, and an entire concept was not only born and executed, it was received. The Black side of Tyranny and Mutation is its reliance on speed, punched-up big guitars, and throbbing riffs such as in "The Red and the Black," "O.D'd on Life Itself," "Hot Rails to Hell," and "7 Screaming Diz-Busters," all of which showcased the biker boogie taken to a dizzyingly extreme boundary; one where everything flies by in a dark blur, and the articulations of that worldview are informed as much by atmosphere as idea. This is screaming, methamphetamine-fueled rock & roll that was all about attitude, mystery, and a sense of nihilistic humor that was deep in the cuff. On the Red Side, beginning with the syncopated striations of "Baby Ice Dog," in which Allen Lanier's piano was as important as Buck Dharma's guitar throb, elements of ambiguity and bluesy swagger enter into the mix. Eric Bloom was the perfect frontman: he twirled the words around in his mouth before spitting them out with requisite piss-and-vinegar, and a sense of decadent dandy that underscored the music's elegance, as well as its power. He was at ease whether the topic was necromancy, S&M, apocalyptic warfare, or cultural dissolution. While BOC's Secret Treaties is widely recognized as the Cult's classic album, one would do well to consider Tyranny and Mutation in the same light.