Transguild Promenade (RTR) from Return to Ravnica, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Noah Bradley
• Card Text:
  Transguild Promenade enters the battlefield tapped.
  When Transguild Promenade enters the battlefield, sacrifice it unless you pay 1.
  T: Add one mana of any color to your mana pool.