flavorText: To resist Thassa is to deny the rising tide.
name: Thassa's Rebuff
originalText: Counter target spell unless its controller pays {X}, where X is your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)
printings: BNG
text: Counter target spell unless its controller pays {X}, where X is your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)
type: Instant