Trash up to 4 cards from your hand.
If this is the first time you played a Fool's Gold this turn, this is worth 1 Treasure, otherwise it's worth 4 Treasure.
When another player gains a Province, you may trash this from your hand. If you do, gain a Gold, putting it on your deck.
While this is in play, Action cards cost 2 treasure less, but not less than 0 treasure.
If there are one or more empty Supply piles, +1 Card. If there are two or more, +1 treasure and +1 Buy.
When you play this, you may gain a Copper, putting it into your hand.
When you gain this, each other player gains a Curse.
Trash this card. Put an Embargo token on top of a Supply pile.
When a player buys a card, he gains a Curse card per Embargo token on that pile.
All cards (including cards in players' hands) cost 1 Treasure less this turn, but not less than 0 Treasure.
While this is in play, cards cost 1 Treasure less, but not less than 0 Treasure.
You may choose an Action card in your hand. Play it three times.
Note that I always play this one with Colonies and Platinum.