Captured Sunlight is a common Sorcery card from Alara Reborn (ARB), collector number 66. Current market price: $0.14 (foil $0.47), TCGplayer market prices via Scryfall.
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.) You gain 4 life.