Set: Seaside
+2$
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.
Cost 2:
Putting two and two together with this card is a real headache. I think maybe there are strategies where this works but I don't really know what they are. It's kind of fun to figure out though.
I guess what you're supposed to do with this is, in the rare scenarios where you are actually pursuing a different strategy than your opponent, to use Embargo and pull the rug out from underneath them. I suppose you could also Embargo a card that you have bought and they have not, or you have bought more of. Something like Tactician would be especially good with this, a card that you really only need one of - I don't know if it'd be as good with, say, Laboratory. Embargo is also an interesting play against Golds or Silvers if they are trying to go big money and you're pursuing a moneyless strategy.
Since the Curse pile is limited though, Embargo doesn't really last forever. If there are Cursing attacks in the game, Embargo will eventually stop mattering - but on the other hand, opening up Witch/Embargo and then Embargoing Witch is a pretty great opener, as long as you don't draw the two cards dead (which is fairly likely actually).
Some people underestimate the value of ignoring the Embargo and buying a card anyway. I mean, if you really need the card, then get the card. It won't work well if it's a spammy card, but if you need that Witch that just got Embargoed, take the Curse. It is just one Curse, after all. Some people get absolutely terrified to go anywhere near an Embargoed supply pile.
The only other interesting thing about this card is that it's a (one-time) terminal Silver, but it's the only one that is cheaper than Silver itself. I don't really think that matters but it's interesting.
Usually I just don't really take the time to use it though, if it's not a turn where I wound up with 2 I'm probably not buying it and messing around with it. Once in a while it is an interesting play though, and I find it to be an entertaining card.