name=Counterbalance
image=https://magiccards.info/scans/en/cs/31.jpg
value=4.517
rarity=U
type=Enchantment
cost={U}{U}
timing=enchantment
requires_groovy_code
oracle=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.
