Counterbalance (Foil) (CSP) from Coldsnap, available at 401 Games Canada.

• Rarity: Uncommon
• Finish: Foil
• Artist: John Zeleznik
• Card Text:
  Whenever an opponent plays a spell, you may reveal the top card of your library. If you do, counter that spell if it has the same converted mana cost as the revealed card.