Angelic Favor is a uncommon Instant card from Nemesis (NEM), collector number 1. Current market price: $0.16 (foil $4.00), TCGplayer market prices via Scryfall.
If you control a Plains, you may tap an untapped creature you control rather than pay this spell's mana cost. Cast this spell only during combat. Create a 4/4 white Angel creature token with flying. Exile it at the beginning of the next end step.