Dense, eccentric metal
I think this is the most eccentric metal album I've ever heard - and it is AWESOME. There are a lot of sudden style changes; each song has more variety than a typical entire album. They take a wide range of metal styles, add some fiddle/violin, piano, funky bass (and was that a saxophone I heard briefly?), season with grandiosity and absurdity, and whip it together with tight playing into something dense, heavy, and weird that brings a grin to my face.