False Dawn is a rare Sorcery card from Apocalypse (APC), collector number 10. Current market price: $0.35 (foil $9.27), TCGplayer market prices via Scryfall.
Until end of turn, spells and abilities you control that would add colored mana instead add that much white mana. Until end of turn, you may spend white mana as though it were mana of any color. Draw a card.