Nirkana Revenant is a mythic Creature — Vampire Shade card from Rise of the Eldrazi (ROE), collector number 120. Current market price: $8.06 (foil $107.03), TCGplayer market prices via Scryfall.
Whenever you tap a Swamp for mana, add an additional {B}. {B}: This creature gets +1/+1 until end of turn.