Family's Favor is a rare Enchantment card from New Capenna Commander Promos (PNCC), collector number 59p. Current market price: — (foil $12.73), TCGplayer market prices via Scryfall.
Whenever you attack, put a shield counter on target attacking creature. Until end of turn, it gains "Whenever this creature deals combat damage to a player, remove a shield counter from it. If you do, draw a card." (If a creature with a shield counter on it would be dealt damage or destroyed, remove a shield counter from it instead.)