Contrabalançar

Encantamento, UU (2)
Toda vez que um oponente joga uma mágica, você pode revelar o card do topo de seu grimório. Se fizer isso, anule aquela mágica se ela tiver o mesmo custo de mana convertido do card revelado.
Illus. John Zeleznik

Enchantment
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.¹

Crystal Keep Rulings Summaries

• Note - Also see Converted Mana Cost, Rule G3.29.
• Note - Also see Mana Cost and Color, Rule 203.

Format Legality	Legal in Vintage, Legacy, Extended Banned in Standard
Printings (1/9)	Frente Fria (Uncommon)