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

• Rarity: Mythic Rare
• Finish: Normal
• Artist: Cliff Childs
• Card Text:
  Mirrorpool enters the battlefield tapped.
  T: Add C to your mana pool.
  2C, T, Sacrifice Mirrorpool: Copy target instant or sorcery spell you control. You may choose new targets for the copy.
  4C, T, Sacrifice Mirrorpool: Put a token onto the battlefield that's a copy of target creature you control.