Prismatic Undercurrents is a uncommon Enchantment card from Lorwyn Eclipsed (ECL), collector number 189. Current market price: $0.37 (foil $0.35), TCGplayer market prices via Scryfall.
Vivid — When this enchantment enters, search your library for up to X basic land cards, where X is the number of colors among permanents you control. Reveal those cards, put them into your hand, then shuffle. You may play an additional land on each of your turns.