MTG Single

Counterbalance (Borderless · Full Art) (SLD 1220) [Secret Lair Drop]

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Set: Secret Lair Drop
Collector Number: 1220
Rarity: Rare
Type: Enchantment
Mana Cost: {U}{U}
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 mana value as the revealed card.