Disrupting Shoal is a rare Instant — Arcane card from Betrayers of Kamigawa (BOK), collector number 33. Current market price: $16.22 (foil $284.82), TCGplayer market prices via Scryfall.
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.