I was thinking about introducing cards as possible source of actions for player, however, rotation is pretty much basic move and should be available constantly. Also player can't move - hero moves on their own (they can't however rotate rooms in current concept). I think I will introduce several basic actions that are always available for action points, and more rare consumable cards with more specific actions (e.g. reroll loot in chest or allow hero to do guaranteed critical hit for next few attacks).
In general, this system might be changed several times through development process.