Disrupting Shoal

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

If a spell has 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.

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