Tainted Wood (DDM) from Duel Decks: Jace vs. Vraska, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Rob Alexander
• Card Text:
  T: Add 1 to your mana pool.
  T: Add B or G to your mana pool. Activate this ability only if you control a Swamp.