Swiftwater Cliffs (DDS) from Duel Decks: Mind vs. Might, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Eytan Zana
• Card Text:
  Swiftwater Cliffs enters the battlefield tapped.
  When Swiftwater Cliffs enters the battlefield, you gain 1 life.
  T: Add U or R to your mana pool.