The Nightwalker

+1: Choose one: Add {b}{b}{b} to your mana pool or target land becomes a swamp in addition to its other types.
X: You may choose and activate any ability of any other Planeswalker on the battlefield. X is the loyalty cost of the chosen ability.
-5: You gain an Emblem that says "Sacrifice a creature: you may cast one spell from your graveyard this turn. Creatures cast this way have Swampwalk.