Rise of the Dread Marn is a rare Instant card from Kaldheim Promos (PKHM), collector number 107s. Current market price: — (foil $1.54), TCGplayer market prices via Scryfall.
Create X 2/2 black Zombie Berserker creature tokens, where X is the number of nontoken creatures that died this turn. Foretell {B} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)