When a game starts, on top of the card swap screen, show the tally with that opponent in wins-ties-losses - for both friends and others.
Maintain some stats like best winning and losing streak, number of wins without passing rounds, etc.
After finishing a game, option to offer rematch and send friend request. For rematch offer faction selection.
Offer discount on ores for multiple kegs bought together.
Once a card is crafted for a second time, require slightly less resources.
