Prismatic Undercurrents (ECL) from Lorwyn Eclipsed, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Steve Ellis
• Card Text:
  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.