Skyreaping is a uncommon Sorcery card from Born of the Gods (BNG), collector number 140. Current market price: $0.20 (foil $0.46), TCGplayer market prices via Scryfall.
Skyreaping deals damage to each creature with flying equal to your devotion to green. (Each {G} in the mana costs of permanents you control counts toward your devotion to green.)