Theros Beyond Death

Glimpse of Freedom | Instant | | Draw a card. Escape—{2}{U}, Exile five other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.) | Clint Cearley

Medomai's Prophecy | Enchantment | Saga | (As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.) I — Scry 2. II — Choose a card name. III — When you cast a spell with the chosen name for the first time this turn, draw two cards. IV — Look at the top card of each player's library. | Seb McKinnon

Omen of the Sea | Enchantment | | Flash When Omen of the Sea enters the battlefield, scry 2, then draw a card. {2}{U}, Sacrifice Omen of the Sea: Scry 2. | Piotr Dura

Protean Thaumaturge | Creature | Human Wizard | Constellation — Whenever an enchantment enters the battlefield under your control, you may have Protean Thaumaturge become a copy of another target creature, except it has this ability. | Izzy

Riptide Turtle | Creature | Turtle | Flash Defender | Brian Valeza

Starlit Mantle | Enchantment | Aura | Flash Enchant creature you control When Starlit Mantle enters the battlefield, enchanted creature gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.) Enchanted creature gets +1/+1. | Chris Rahn

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

Sweet Oblivion | Sorcery | | Target player mills four cards. Escape—{3}{U}, Exile four other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.) | Clint Cearley

Thassa's Intervention | Instant | | Choose one — • Look at the top X cards of your library. Put up to two of them into your hand and the rest on the bottom of your library in a random order. • Counter target spell unless its controller pays twice {X}. | Zack Stella

Thassa's Oracle | Creature | Merfolk Wizard | When Thassa's Oracle enters the battlefield, look at the top X cards of your library, where X is your devotion to blue. Put up to one of them on top of your library and the rest on the bottom of your library in a random order. If X is greater than or equal to the number of cards in your library, you win the game. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.) | Jesper Ejsing

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

Towering-Wave Mystic | Creature | Merfolk Wizard | Whenever Towering-Wave Mystic deals damage, target player mills that many cards. | Jason Rainville

Staggering Insight | Enchantment | Aura | Enchant creature Enchanted creature gets +1/+1 and has lifelink and "Whenever this creature deals combat damage to a player, draw a card." | Dmitry Burmak

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