撹乱する群れ

あなたはこの呪文のマナ・コストを支払うのではなく、あなたの手札から点数で見たマナ・コストがＸの青のカード１枚を追放してもよい。
呪文１つを対象とする。それの点数で見たマナ・コストがＸであるなら、それを打ち消す。

Disrupting Shoal

You may exile a blue card with mana value X from your hand rather than pay this spell's mana cost.
Counter target spell if its mana value is X.

Ultimate Masters

You may exile a blue card with converted mana cost X from your hand rather than pay this spell's mana cost.
Counter target spell if its converted mana cost is X.

Betrayers of Kamigawa

You may remove a blue card with converted mana cost X in your hand from the game rather than pay Disrupting Shoal's mana cost.
Counter target spell if its converted mana cost is X.

Disrupting Shoal can target any spell, but does nothing unless that spell's mana value is X.

If a card in your hand has {X} in its mana cost, X is considered to be 0.

If a spell has {X} in its mana cost, include the value chosen for that X when determining the mana value of that spell, even if it was cast for an alternative cost and no mana was spent on X.