Shalai, Voice of Plenty is a rare Legendary Creature — Angel card from Dominaria Promos (PDOM), collector number 35p. Current market price: $2.73 (foil $5.76), TCGplayer market prices via Scryfall.
Flying You, planeswalkers you control, and other creatures you control have hexproof. {4}{G}{G}: Put a +1/+1 counter on each creature you control.