"the thing staring at him wore a buffalo’s head, rank and furry with huge wet eyes. Its body was a man’s body, oiled and slick."

This description of the Buffalo Man initially sounds like the Greek monster, the Minotaur. But the buffalo is an animal sacred to many Native American peoples, and the creature in Shadow's dream is also reminiscent of Wakan Tanka the ultimate power of the Lakota universe.