Kaya the Inexorable is a mythic Legendary Planeswalker — Kaya card from Kaldheim Promos (PKHM), collector number 218p. Current market price: $6.48 (foil $9.92), TCGplayer market prices via Scryfall.
+1: Put a ghostform counter on up to one target nontoken creature. It gains "When this creature dies or is put into exile, return it to its owner's hand and create a 1/1 white Spirit creature token with flying." −3: Exile target nonland permanent. −7: You get an emblem with "At the beginning of your upkeep, you may cast a legendary spell from your hand, from your graveyard, or from among cards you own in exile without paying its mana cost."