Dose of Dawnglow is a uncommon Instant card from Lorwyn Eclipsed (ECL), collector number 100. Current market price: $0.17 (foil $0.27), TCGplayer market prices via Scryfall.
Return target creature card from your graveyard to the battlefield. Then if it isn't your main phase, blight 2. (Put two -1/-1 counters on a creature you control.)