Relic Retriever is a rare Creature — Spirit Monkey card from Secrets of Strixhaven Commander (SOC), collector number 35. Current market price: $0.21, TCGplayer market prices via Scryfall.
First strike At the beginning of each end step, if a card left your graveyard this turn, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")