Sapling of Colfenor is a rare Legendary Creature — Treefolk Shaman card from Commander 2021 (C21), collector number 228. Current market price: $6.01, TCGplayer market prices via Scryfall.
Indestructible Whenever Sapling of Colfenor attacks, reveal the top card of your library. If it's a creature card, you gain life equal to that card's toughness, lose life equal to its power, then put it into your hand.