Simulacrum is the closest John Zorn has ever come to traditional metal. It is still Zorn, though, so you won't mistake it for Metallica. It's an all-instrumental work featuring Kenny Grohowski (Abraxas) on drums, Matt Hollenberg (Cleric) on guitar, and John Medeski (yes, of Medeski, Martin, and Wood) on organ. This unusual lineup plays music composed by Zorn. (Imagine a more coherent Behold... the Arctopus with an organ.) There are some fantastic riffs, and the production is very good. However, the songs run together, and the closing track is too long.