This promo card is part of the BGG special Dominion promotion. Its English edition was distributed along with the Envoy Promo Card beginning in March 2009 through The BGG Store.
In Germany the "Schwarzmarkt" was distributed together with Spielbox 2/09.
(Before the game, make a Black Market deck out of one copy of each Kingdom card not in the supply.)
Part of the Dominion series.
Dominion promos fan
I play Dominion with all the expansions mixed in.