The playable Terrain Cards and Ability Cards are the main method you interact with the world. There are different cards you can play each turn that will have specific effects on your world. There are specific card rules that determine the effects of each individual card on the world and how they can or can not be used. When your turn begins, you have a limited number of cards visible to you that you can use during that turn. At the beginning of each turn new cards appear to replace the ones you used in your previous turn, so that your card hand is always filled to its maximum hand size. Your maximum hand size is 3 cards max by default. Under normal circumstances, you can only use two cards each turn, in any combination of Terrain and Ability Cards. After a card is used it disappears from your hand for that turn, although there is a chance you may draw the same card again in the next turn when your hand is refilled with cards.