Yorvo, Lord of Garenbrig is a rare Legendary Creature — Giant Noble card from Throne of Eldraine Promos (PELD), collector number 185p. Current market price: $0.66 (foil $0.63), TCGplayer market prices via Scryfall.
Yorvo enters with four +1/+1 counters on it. Whenever another green creature you control enters, put a +1/+1 counter on Yorvo. Then if that creature's power is greater than Yorvo's power, put another +1/+1 counter on Yorvo.