Make it possible for a card to display an option but not actually allow it to be selected. It's up to the UI layer to decide how to display options that are not enabled. The option text should probably contiain a note on why the option cannot be selected...
A card can be shuffled into the deck because of a certain condition, and then that condition could cease to apply. If the card should not be presented to the player, it gets one last chance to hide.
There is currently no direct mechanism for making a card _already in the hand_ disappear if it is not relevant, although there are various ways to implement a Rule to do this.
Add a callback to the Card interface to be invoked after an option is selected. This will most frequently be used for cards that always want to shuffle themselves back into the deck regardless of the Option selected.
