Counterbalance

Counterbalance

    U U
Enchantment

Whenever an opponent casts 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.

illus. Joseph Meehan # 9/54

Oracle Text

Whenever an opponent casts 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.