Kaya, Ghost Assassin is a mythic Legendary Planeswalker — Kaya card from The List (PLST), collector number CN2-75. Current market price: $3.35, TCGplayer market prices via Scryfall.
0: Exile Kaya or up to one target creature. Return that card to the battlefield under its owner's control at the beginning of your next upkeep. You lose 2 life. −1: Each opponent loses 2 life and you gain 2 life. −2: Each opponent discards a card and you draw a card.