Kamahl, Fist of Krosa is a rare Legendary Creature — Human Druid card from Onslaught (ONS), collector number 268. Current market price: $4.11 (foil $54.10), TCGplayer market prices via Scryfall.
{G}: Target land becomes a 1/1 creature until end of turn. It's still a land. {2}{G}{G}{G}: Creatures you control get +3/+3 and gain trample until end of turn.