A few things a better way to organize your cards. maybe with a scroll bar or another idea of making the buttons "stick" sort of like toggling on and off
so if you click darkness--> all you darkness cards show up,
if you click time after darkness and time show up
if you click darkness again the darkness cards will disapear.
there could be another button that shows upped or unupped
Also when you win or lose a game, it might be kinda amusing to see some "stats", I know there are turns, and time but what about damage taken for both sides(not counting healing), total electrum produced. I am just throwing up random things but they could be fun