Was looking at Ironmonger, and was wondering how to make Curses useful for it. Here goes.
Iron Maiden
Action-Attack - $5
Each other player gains a Curse.
Reveal the top card of your deck; discard it or put it back. Either way, if it is a(n)...
Action card, +1 Action
Treasure card, +$1
Victory Card, +1 Card
Curse, +1 Buy
Shelter, you may trash it or a card in your hand.
FAQ: If you reveal Overgrown Estate, trash a card before drawing a card. If you trash Overgrown Estate, you will draw two cards.