The fusion between a trader and a swindler...
Profiteer
Trash a card from your hand, gain three cards cheaper than it.
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When you gain a card, you may reveal this. If you do, trash that card and gain a card costing less or equal to that card.
Action - Reaction - $4
So it can only change your opponents' curses to coppers, instead of silvers. By trashing a feodum, you can gain only six silvers instead of trader's seven. Anyway, it's still useful against cursers and ambassadors. It is, obviously, quite a good counter against Swindlers.
It has some interesting combo on its own. For example, with two quarries played and a profiteer in your hand, you can buy a Death Cart, gaining two ruins along with it. You then reveal this, trashing the ruins to get another Death Cart and another card you want to buy (say, Great Hall). In this way, you can buy 10 Death Carts + 10 Great Halls in one turn, trashing 20 ruins along the way, therefore instantly win.
