Thalisse, Reverent Medium is a uncommon Legendary Creature — Human Cleric card from Commander Legends (CMR), collector number 291. Current market price: $0.33 (foil $0.50), TCGplayer market prices via Scryfall.
At the beginning of each end step, create X 1/1 white Spirit creature tokens with flying, where X is the number of tokens you created this turn.