The Spy is a Spaniard, and is only waiting around to kill you, but will promise you he will not kill you until you reach the top, although he hates waiting.
The thing I love the very most about Inigo Montoya is that in the end he doesn't go all kids' movie and let the guy go or say that revenge solves nothing. He buries his steel in the villian's heart and spits his vengeance at him as he dies.