Missy is a rare Legendary Creature — Time Lord Rogue card from Doctor Who (WHO), collector number 1137. Current market price: — (foil $20.27), TCGplayer market prices via Scryfall.
Whenever another nonartifact creature dies, return it to the battlefield under your control face down and tapped. It's a 2/2 Cyberman artifact creature. At the beginning of your end step, each opponent faces a villainous choice — Each artifact creature you control deals 1 damage to that opponent, or you draw a card and chaos ensues.