The Undertaker

+1: Discard the top card of your library until you reveal a land card. Undertaker does damage to target player or creature for each revealed this way
-2: Until the beginning of your next turn, Undertaker becomes a 6/6 Zombie Warrior with Indestructible, and Reach. It's still a planeswalker.
-8: You gain an emblem: "You may cast cards in your graveyard without paying their mana cost." The Undertaker can be your Commander.