Sanctuary Warden is a mythic Creature — Angel Soldier card from Streets of New Capenna Promos (PSNC), collector number 30p. Current market price: $1.96 (foil $1.45), TCGplayer market prices via Scryfall.
Flying This creature enters with two shield counters on it. Whenever this creature enters or attacks, you may remove a counter from a creature or planeswalker you control. If you do, draw a card and create a 1/1 green and white Citizen creature token.