DominionStrategy Wiki
WHALE$6 - Action/Attack/Curse-1VP+3 CardsEach other player may discard a Ghost/Merchant/Pirate Ship from his hand, or he gains a Curse. If any Curses are gained in this way, +$2.
Very interesting on-gain solution... you could end the game in a megaturn by Ambassadoring all 10 of them to your opponent, but that is the sort of interesting edge-case that Dominion players like.
You just don't leave f:ds.