Queen Marchesa is a mythic Legendary Creature — Human Assassin card from Secret Lair Drop (SLD), collector number 499. Current market price: $8.04 (foil $8.60), TCGplayer market prices via Scryfall.
Deathtouch, haste When Queen Marchesa enters, you become the monarch. At the beginning of your upkeep, if an opponent is the monarch, create a 1/1 black Assassin creature token with deathtouch and haste.