I like how City and Trade Route create an interactive tension amongst players by drawing their power from a common resource. While cards like Tournament and Black Market reward one lucky player with a unique reward, strengthening your City or Trade Route is apt to help your opponent just as much.
Yesterday I posted a treasure card named Diamond which drew its value from a shared source as well, creating player interaction. It got mostly positive feedback, so today I want to share another shared resource idea I've been thinking about.
Town Commons
$2 Action
+2 Cards
Choose one: Place three cards from your hand face up on the Town Commons mat; or put three cards from the Town Commons mat into your hand.
The catch? There is just one shared Town Commons mat. At the end of the game, cards are on the Town Commons mat are NOT returned to any player's deck.
It's a bit like a mix of Chapel and Beggar. It seems like it would be a popular opener. It doesn't thin your deck as quickly as Chapel, but you do get to draw two cards first, which can help you out. You are forced to return three cards. In part this is to prod the player into tossing something better than copper/estate/curse into the commons. Drawing two cards first should make this a bit more palatable. Also, what if you have two junk cards? Do you hope to draw a third from the +2 Cards? If you don't draw another junk card, you're likely to either throw in a Silver or take three cards out of the Commons. Taking three Coppers out could be quite nice at times. Taking out three Estates may even be a wise move in the end game.