Each player looks at the top 5 cards of his or her deck. Your opponent rearranges his or her 5 cards as he or she likes and puts them on top of his of her deck face up. Then, you rearrange your 5 cards as you like and put them on top of your deck face up. (If a player shuffles his or her deck when it still has face up cards in it, that player puts them face down again before shuffling.)