Drawing on a 1978 children’s book by Ul de Rico, The Desaturating Seven is a concept album that deals with a group of goblins who drain the color from rainbows to fill their insatiable appetites. As bizarre and fantastical as this premise is, it is only fitting for a band that has found great success with their strange blend of funk and heaviness, as well as offbeat sense of humor. The Desaturating Seven finds Primus venturing into proggier pastures, with multi-part suites and Rush-like interludes working their way into the band’s signature formula. The album takes cues from King Crimson’s Discipline as well, with angular guitar lines and groovy use of complex time signatures abound. However, by and large this is the same group you know and love, with Les Claypool’s distinctive lead bass playing and carnie-through-a-CB-radio squawk front and center. The Desaturating Seven is a convincing argument for totally making “Goblin Rock” a thing.