Liliana, Death's Majesty is a mythic Legendary Planeswalker — Liliana card from Amonkhet (AKH), collector number 97. Current market price: $0.52 (foil $14.68), TCGplayer market prices via Scryfall.
+1: Create a 2/2 black Zombie creature token. Mill two cards. −3: Return target creature card from your graveyard to the battlefield. That creature is a black Zombie in addition to its other colors and types. −7: Destroy all non-Zombie creatures.