Star Charter is a uncommon Creature — Bat Cleric card from Bloomburrow (BLB), collector number 33. Current market price: $0.19 (foil $0.30), TCGplayer market prices via Scryfall.
Flying At the beginning of your end step, if you gained or lost life this turn, look at the top four cards of your library. You may reveal a creature card with power 3 or less from among them and put it into your hand. Put the rest on the bottom of your library in a random order.