Mammoth Growth is a common Instant card from Kaldheim (KHM), collector number 183. Current market price: $0.20 (foil $0.33), TCGplayer market prices via Scryfall.
Target creature gets +4/+4 until end of turn. Foretell {G} (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.)