Theros Beyond Death

Alirios, Enraptured | Legendary Creature | Human | Alirios, Enraptured enters the battlefield tapped. Alirios doesn't untap during your untap step if you control a Reflection. When Alirios enters the battlefield, create a 3/2 blue Reflection creature token. | Kieran Yanner

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

Sage of Mysteries | Creature | Human Wizard | Constellation — Whenever an enchantment enters the battlefield under your control, target player mills two cards. | John Stanko

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

Shoal Kraken | Creature | Kraken | Constellation — Whenever an enchantment enters the battlefield under your control, you may draw a card. If you do, discard a card. | Vincent Proce

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

Threnody Singer | Creature | Siren | Flash Flying When Threnody Singer enters the battlefield, target creature an opponent controls gets -X/-0 until end of turn, where X is your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.) | PINDURSKI

Devourer of Memory | Creature | Nightmare | Whenever one or more cards are put into your graveyard from your library, Devourer of Memory gets +1/+1 until end of turn and can't be blocked this turn. {1}{U}{B}: Mill a card. | Daarken

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

Eutropia the Twice-Favored | Legendary Creature | Human Wizard | Constellation — Whenever an enchantment enters the battlefield under your control, put a +1/+1 counter on target creature. That creature gains flying until end of turn. | Sara Winters