Teysa Karlov is a rare Legendary Creature — Human Advisor card from Secret Lair Drop (SLD), collector number 1235. Current market price: $76.60 (foil $82.58), TCGplayer market prices via Scryfall.
If a creature dying causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time. Creature tokens you control have vigilance and lifelink.