The hard part is writing your patter so that it doesn't sound like you're listing cards. Without giving away too many magical secrets, I invite you to consider

The hard part is writing your patter so that it doesn't sound like you're listing cards. Without giving away too many magical secrets, I invite you to consider the fact that there are many ways to reference cards more subtly. Color, suit, number, high and low. There are also a few different possible reactions.