Are you kidding? Guardians are so much cooler.
They look like Bikes on steroids, and they're raw with power. Centurions aren't as cool, in my humble opinion.
I like when you double lift the top card to show the chosen card, put down the indifferent card on top of it, and dribble on that until there is one card on top: the chosen card.
I like all these ideas, and Daniel Madison's concept of sticking it on a clock hand is brilliant.
I guess I use too many cliches; I just have it "go" to my pocket or the spectator's pocket.