Corrupted Crossroads (OGW) from Oath of the Gatewatch, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Ryan Pancoast
• Card Text:
  T: Add C to your mana pool. (C represents colorless mana.)
  T, Pay 1 life: Add one mana of any color to your mana pool. Spend this mana only to cast a spell with devoid.