Prohibit [Duel Decks: Jace vs. Vraska]

Set: Duel Decks: Jace vs. Vraska Type: Instant Rarity: Common Cost: {1}{U} Kicker {2} (You may pay an additional {2} as you cast this spell.)Counter target spell if its mana value is 2 or less. If this spell was kicked, counter that spell if its mana value is 4 or less instead.