Diamond
$2 Treasure
+$6
-$1 per Diamond in the supply. Return this card to the supply.
You only play with six cards in the Diamond supply pile.
FAQ:
* If you Counterfeit a Diamond, you do not trash it. Suppose there are three Diamonds in the supply. When you Counterfeit a Diamond you will play it once, producing $3 and return it to the supply, and then play it a second time producing $2. The Counterfeit "loses track" of the Diamond, and so it is not trashed.
* If Diamond is in the Black Market deck, there is no Diamond supply pile. If you play a Diamond acquired from the Black Market, it will produce $6 and will remain in your deck as there is no supply pile to return it to. If you Counterfeit a Black Market copy of Diamond, then you will trash it since Counterfeit does not lose track of the card.
I think it's a neat idea, but I may want to tweak the price or the number of Diamonds in the supply. The idea is that it is worth more when Diamonds are scarce in the supply. To prevent them from growing too overwhelming, they are returned to the supply when played, thereby weakening successive Diamonds. I feel that they produce an interesting dynamic, wherein they are more valuable when you and your opponent each hoard them, but by spending them you devalue your opponents Diamonds. I priced them low since they are essentially one-shots. I imagine that they would be popular targets of spare buys in two player games, and situationally even with single buys in larger multiplayer games if others go for them. I imagine buying a couple in a four player game to make them attractive to the other players, and then spending mine while they hold theirs. Another interesting strategy would be to trash all but one of them, and use a spare buy to repurchase it each time you play it.