What do you mean by cards in play? Do cards in my hand count?

Cards that are in your hand are not in play and don't count as anything but cards until you play them. (For instance, if you are told to lose your Armor and you have an Armor card in your hand, you can't lose that one.) Your cards on the table are cards in play and these represent what they say they are. For example, a Race card is a card and a Race.
Related Rule(s)