Gruul Keyrune (GTC) from Gatecrash, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Daniel Ljunggren
• Card Text:
  T: Add R or G to your mana pool.
  RG: Gruul Keyrune becomes a 3/2 red and green Beast artifact creature with trample until end of turn.