Thalisse, Reverent Medium is a uncommon Legendary Creature — Human Cleric card from Tarkir: Dragonstorm Commander (TDC), collector number 306. Current market price: $0.28, 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.