Callaphe, Beloved of the Sea (Theros Beyond Death)

Legendary Enchantment Creature — Demigod - Callaphe's power is equal to your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)
Creatures and enchantments you control have "Spells your opponents cast that target this permanent cost {1} more to cast."