Theros Beyond Death

Ichthyomorphosis

Ichthyomorphosis {2}{U}

Enchantment - Aura
Enchant creature
Enchanted creature loses all abilities and is a blue Fish with base power and toughness 0/1.
Tycthis's military career was a flop.
Kiora Bests the Sea God

Kiora Bests the Sea God {5}{U}{U}

Enchantment - Saga
I — Create an 8/8 blue Kraken creature token with hexproof.
II — Tap all nonland permanents target opponent controls. They don't untap during their controller's next untap step.
III — Gain control of target permanent an opponent controls. Untap it.
Medomai's Prophecy

Medomai's Prophecy {1}{U}

Enchantment - Saga
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.
Memory Drain

Memory Drain {2}{U}{U}

Instant
Counter target spell. Scry 2.
Alythos sat and stared blankly out over the glassy oceans of Nerono, trying in vain to remember what he knew he had forgotten.
Nadir Kraken

Nadir Kraken {1}{U}{U}

Creature - Kraken
Whenever you draw a card, you may pay {1}. If you do, put a +1/+1 counter on Nadir Kraken and create a 1/1 blue Tentacle creature token.
2/3
Related cards: Oyaminartok, Polar Werebear Tireless Angler
Naiad of Hidden Coves

Naiad of Hidden Coves {2}{U}

Enchantment Creature - Nymph
During turns other than yours, spells you cast cost {1} less to cast.
"Wave-borne, he watches over secrets of the shore."
—Psemilla, Meletian poet
2/3
Nyxborn Seaguard

Nyxborn Seaguard {2}{U}{U}

Enchantment Creature - Merfolk Soldier
"Storm-tossed and broken, Callaphe cried out to deep-dwelling Thassa.
Tritons came swiftly to save her, bringing her north to the Lindus."
—The Callapheia
2/5
Omen of the Sea

Omen of the Sea {1}{U}

Enchantment
Flash
When Omen of the Sea enters, scry 2, then draw a card.
{2}{U}, Sacrifice Omen of the Sea: Scry 2.
"My time will come, when the rising tide will surge above the tallest mountain."
One with the Stars

One with the Stars {3}{U}

Enchantment - Aura
Enchant creature or enchantment
Enchanted permanent is an enchantment and loses all other card types.
"Take your place among the stars."
—Kruphix, god of horizons
Protean Thaumaturge

Protean Thaumaturge {1}{U}

Creature - Human Wizard
Constellation — Whenever an enchantment you control enters, you may have Protean Thaumaturge become a copy of another target creature, except it has this ability.
"Once you see past the veil we call 'reality,' altering your own shape is elementary."
1/1
Riptide Turtle

Riptide Turtle {1}{U}

Creature - Turtle
Flash
Defender
"As the storm waves crushed my sailors, I cried out to Thassa. The next time I saw them, hard shells encased them, and they swam away to safety."
—Siona, captain of the Pyleas
0/5
Related cards: Oyaminartok, Polar Werebear Tireless Angler
Sage of Mysteries

Sage of Mysteries {U}

Creature - Human Wizard
Constellation — Whenever an enchantment you control enters, target player mills two cards.
"I see destruction, suffering, and one tormented glimmer of hope."
0/2
Sea God's Scorn

Sea God's Scorn {4}{U}{U}

Sorcery
Return up to three target creatures and/or enchantments to their owners' hands.
Instead of performing their daily devotions, Heliod's acolytes spent the morning picking strands of kelp off the altar.
Shimmerwing Chimera

Shimmerwing Chimera {3}{U}

Enchantment Creature - Chimera
Flying
At the beginning of your upkeep, return up to one other target enchantment you control to its owner's hand.
It swims upon the winds and soars through the waves.
3/2
Shoal Kraken

Shoal Kraken {4}{U}

Creature - Kraken
Constellation — Whenever an enchantment you control enters, you may draw a card. If you do, discard a card.
It eats the things that eat the things that are drawn to the light.
3/5
Sleep of the Dead

Sleep of the Dead {U}

Sorcery
Tap target creature. It doesn't untap during its controller's next untap step.
Escape — {2}{U}, Exile three other cards from your graveyard.
Normally, a cerberus sleeps one head at a time.
Starlit Mantle

Starlit Mantle {1}{U}

Enchantment - Aura
Flash
Enchant creature you control
When Starlit Mantle enters, enchanted creature gains hexproof until end of turn.
Enchanted creature gets +1/+1.
Stern Dismissal

Stern Dismissal {U}

Instant
Return target creature or enchantment an opponent controls to its owner's hand.
Cities offer tribute to Ephara and carve her image into their walls, imploring her to protect them from the dangers of the wild.
Stinging Lionfish

Stinging Lionfish {1}{U}

Enchantment Creature - Fish
Whenever you cast your first spell during each opponent's turn, you may tap or untap target nonland permanent.
Starfish are its favorite prey.
2/1
Related cards: Oyaminartok, Polar Werebear Tireless Angler
Sweet Oblivion

Sweet Oblivion {1}{U}

Sorcery
Target player mills four cards.
Escape — {3}{U}, Exile four other cards from your graveyard.
When memory is torment, oblivion is bliss.
Thassa, Deep-Dwelling

Thassa, Deep-Dwelling {3}{U}

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.
6/5
Thassa's Intervention

Thassa's Intervention {X}{U}{U}

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}.
"I bring a flood that nothing can withstand."
Thassa's Oracle

Thassa's Oracle {U}{U}

Creature - Merfolk Wizard
When Thassa's Oracle enters, 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.
1/3
Thirst for Meaning

Thirst for Meaning {2}{U}

Instant
Draw three cards. Then discard two cards unless you discard an enchantment card.
A sip of recollection, an ocean of regrets.
Threnody Singer

Threnody Singer {1}{U}

Creature - Siren
Flash
Flying
When Threnody Singer enters, target creature an opponent controls gets -X/-0 until end of turn, where X is your devotion to blue.
1/3