Queen Marchesa is a mythic Legendary Creature — Human Assassin card from Conspiracy: Take the Crown (CN2), collector number 78. Current market price: $1.14 (foil $66.33), 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.