A Piano so powerful that who ever is "lucky" enough to have it play will give enough of anything you need to win a loosing fight no matter how injured or backed into a corner you are.
Traitor 1: thanks for saving me
Traitor 2: no problem, but I could've not done it without Il Vento D'oro
Traitor 1: what?
Traitor 2: You know the piano playing
Il Vaticano is a specialchess move, which allows bishops two squares apart to take what's in between them. It's denoted B-O-O-B in standard chess notation.