Thassa's Rebuff (Born of the Gods #54)

Thassa's Rebuff {1}{U}

Instant

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.)

To resist Thassa is to deny the rising tide.

Illustrated by Lucas Graciano

Standard
Alchemy
Pioneer
Explorer
Modern
Historic
Legacy
Brawl
Vintage
Timeless
Commander
Pauper
Oathbreaker
Penny