Theros Beyond Death

Callaphe, Beloved of the Sea | 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." | Zack Stella

Eidolon of Philosophy | Enchantment Creature | Spirit | {6}{U}, Sacrifice Eidolon of Philosophy: Draw three cards. | Adam Paquette

Naiad of Hidden Coves | Enchantment Creature | Nymph | As long as it's not your turn, spells you cast cost {1} less to cast. | Kieran Yanner

Nyxborn Seaguard | Enchantment Creature | Merfolk Soldier | | Simon Dominic

Shimmerwing Chimera | Enchantment Creature | Chimera | Flying At the beginning of your upkeep, return up to one other target enchantment you control to its owner's hand. | Christopher Burdett

Stinging Lionfish | Enchantment Creature | Fish | Whenever you cast your first spell during each opponent's turn, you may tap or untap target nonland permanent. | Christopher Burdett

Thassa, Deep-Dwelling | Legendary Enchantment Creature | God | Indestructible As long as your devotion to blue is less than five, Thassa isn't a creature. At the beginning of your end step, exile up to one other target creature you control, then return that card to the battlefield under your control. {3}{U}: Tap another target creature. | Zack Stella

Wavebreak Hippocamp | Enchantment Creature | Horse Fish | Whenever you cast your first spell during each opponent's turn, draw a card. | Caio Monteiro

Witness of Tomorrows | Enchantment Creature | Sphinx | Flying {3}{U}: Scry 1. | Svetlin Velinov

Mischievous Chimera | Enchantment Creature | Chimera | Flying Whenever you cast your first spell during each opponent's turn, Mischievous Chimera deals 1 damage to each opponent. Scry 1. | Antonio José Manzanedo