Sapling of Colfenor is a rare Legendary Creature — Treefolk Shaman card from Eventide (EVE), collector number 128. Current market price: $11.61 (foil $60.18), 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.