Benediction of Moons is a common Sorcery card from Guildpact (GPT), collector number 3. Current market price: $0.08 (foil $0.42), TCGplayer market prices via Scryfall.
You gain 1 life for each player. Haunt (When this spell card is put into a graveyard after resolving, exile it haunting target creature.) When the creature this card haunts dies, you gain 1 life for each player.