I've got a feature request for ya. Extra decks.
An actor has two decks: a main deck, where all the magic happens, and an Extra deck, full of special cards. Cards of the Extra deck cannot be played by direct selection - you need to use a card on your hand to use those. Some cards can generate other cards to be sent to the Extra deck. Once a card from the Extra Deck is used, it is automatically removed from play - there is no discard pile for those. Cards can also have additional effects if played through the Extra Deck rather than the main one. This would add a layer of strategy to cards, since where you place them becomes important.