Golgari Keyrune (RTR) from Return to Ravnica, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Normal
• Artist: Daniel Ljunggren
• Card Text:
  T: Add B or G to your mana pool.
  BG: Golgari Keyrune becomes a 2/2 black and green Insect artifact creature with deathtouch until end of turn.