Hazoret's Favor is a rare Enchantment card from Amonkhet (AKH), collector number 137. Current market price: $0.18 (foil $1.19), TCGplayer market prices via Scryfall.
At the beginning of combat on your turn, you may have target creature you control get +2/+0 and gain haste until end of turn. If you do, sacrifice it at the beginning of the next end step.