Tap an untapped Cephalid you control: Tap target permanent.
{U}{U}{U}: Tap all creatures without flying.
3 /
3
{2}{U}
Aether Barrier
Enchantment
Whenever a player casts a creature spell, that player sacrifices a permanent unless they pay {1}.
{3}{U}{U}
Alexi, Zephyr Mage
Legendary Creature - Human Spellshaper
{X}{U}, {T}, Discard two cards: Return X target creatures to their owners' hands.
3 /
3
{2}{U}{U}
Bident of Thassa
Legendary Enchantment Artifact
Whenever a creature you control deals combat damage to a player, you may draw a card.
{1}{U}, {T}: Creatures your opponents control attack this turn if able.
{1}{U}{U}
Callous Oppressor
Creature - Cephalid
You may choose not to untap Callous Oppressor during your untap step.
As Callous Oppressor enters the battlefield, an opponent chooses a creature type.
{T}: Gain control of target creature that isn't of the chosen type for as long as Callous Oppressor remains tapped.
1 /
2
{1}{U}{U}
Capsize
Instant
Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)
Return target permanent to its owner's hand.
{2}{U}
Cephalid Pathmage
Creature - Cephalid Wizard
Cephalid Pathmage can't be blocked.
{T}, Sacrifice Cephalid Pathmage: Target creature can't be blocked this turn.
1 /
2
{2}{U}{U}
Cephalid Retainer
Creature - Cephalid
{U}{U}: Tap target creature without flying.
2 /
3
{1}{U}
Cloak of Mists
Enchantment - Aura
Enchant creature
Enchanted creature can't be blocked.
{1}{U}
Crown of Ascension
Enchantment - Aura
Enchant creature
Enchanted creature has flying.
Sacrifice Crown of Ascension: Enchanted creature and other creatures that share a creature type with it gain flying until end of turn.
{6}{U}{U}
Denizen of the Deep
Creature - Serpent
When Denizen of the Deep enters the battlefield, return each other creature you control to its owner's hand.
11 /
11
{2}{U}
Déjà Vu
Sorcery
Return target sorcery card from your graveyard to your hand.
{1}{U}{U}
Equilibrium
Enchantment
Whenever you cast a creature spell, you may pay {1}. If you do, return target creature to its owner's hand.
{3}{U}{U}
Evacuation
Instant
Return all creatures to their owners' hands.
{2}{U}
Exhaustion
Sorcery
Creatures and lands target opponent controls don't untap during their next untap step.
{3}{U}
Fact or Fiction
Instant
Reveal the top five cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.
{3}{U}{U}
Force of Will
Instant
You may pay 1 life and exile a blue card from your hand rather than pay this spell's mana cost.
Counter target spell.
{2}{U}
Frantic Search
Instant
Draw two cards, then discard two cards. Untap up to three lands.
{1}{U}{U}
Fylamarid
Creature - Squid Beast
Flying
Fylamarid can't be blocked by blue creatures.
{U}: Target creature becomes blue until end of turn.
1 /
3
{4}{U}
Giant Crab
Creature - Crab
{U}: Giant Crab gains shroud until end of turn. (It can't be the target of spells or abilities.)
3 /
3
{3}{U}
Giant Octopus
Creature - Octopus
3 /
3
{3}{U}
Glowing Anemone
Creature - Jellyfish Beast
When Glowing Anemone enters the battlefield, you may return target land to its owner's hand.
1 /
3
{5}{U}{U}
Great Whale
Creature - Whale
When Great Whale enters the battlefield, untap up to seven lands.
5 /
5
{3}{U}
Gulf Squid
Creature - Squid Beast
When Gulf Squid enters the battlefield, tap all lands target player controls.
2 /
2
{U}
High Tide
Instant
Until end of turn, whenever a player taps an Island for mana, that player adds an additional {U}.
{1}{U}
Illuminated Wings
Enchantment - Aura
Enchant creature
Enchanted creature has flying.
{2}, Sacrifice Illuminated Wings: Draw a card.
{1}{U}
Impulse
Instant
Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.
{U}{U}
Invisibility
Enchantment - Aura
Enchant creature
Enchanted creature can't be blocked except by Walls.
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island
Basic Land - Island
({T}: Add {U}.)
--
Island of Wak-Wak
Land
{T}: Target creature with flying has base power 0 until end of turn.
{3}{U}{U}
Killer Whale
Creature - Whale
{U}: Killer Whale gains flying until end of turn.
3 /
5
{4}{U}{U}
King Crab
Creature - Crab
{1}{U}, {T}: Put target green creature on top of its owner's library.
4 /
5
{2}{U}{U}
Levitation
Enchantment
Creatures you control have flying.
{3}{U}
Llawan, Cephalid Empress
Legendary Creature - Cephalid Noble
When Llawan, Cephalid Empress enters the battlefield, return all blue creatures your opponents control to their owners' hands.
Your opponents can't cast blue creature spells.
2 /
3
{2}{U}
Man-o'-War
Creature - Jellyfish
When Man-o'-War enters the battlefield, return target creature to its owner's hand.
2 /
2
{U}
Mind Games
Instant
Buyback {2}{U} (You may pay an additional {2}{U} as you cast this spell. If you do, put this card into your hand as it resolves.)
Tap target artifact, creature, or land.
{1}{U}
Mnemonic Sphere
Artifact
{1}{U}, Sacrifice Mnemonic Sphere: Draw two cards.
Channel -- {U}, Discard Mnemonic Sphere: Draw a card.
{3}{U}{U}
Morphling
Creature - Shapeshifter
{U}: Untap Morphling.
{U}: Morphling gains flying until end of turn.
{U}: Morphling gains shroud until end of turn. (It can't be the target of spells or abilities.)
{1}: Morphling gets +1/-1 until end of turn.
{1}: Morphling gets -1/+1 until end of turn.
3 /
3
{U}
Mystic Remora
Enchantment
Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
Whenever an opponent casts a noncreature spell, you may draw a card unless that player pays {4}.
{8}{U}{U}
Octavia, Living Thesis
Legendary Creature - Elemental Octopus
This spell costs {8} less to cast if you have eight or more instant and/or sorcery cards in your graveyard.
Ward {8}
Magecraft -- Whenever you cast or copy an instant or sorcery spell, target creature has base power and toughness 8/8 until end of turn.
8 /
8
{1}{U}
Ovinize
Instant
Until end of turn, target creature loses all abilities and has base power and toughness 0/1.
{U}
Preordain
Sorcery
Scry 2, then draw a card. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)
{2}{U}
Propaganda
Enchantment
Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.
{3}{U}
Ray of Command
Instant
Untap target creature an opponent controls and gain control of it until end of turn. That creature gains haste until end of turn. When you lose control of the creature, tap it.
{1}{U}{U}
Relearn
Sorcery
Return target instant or sorcery card from your graveyard to your hand.
--
Reliquary Tower
Land
You have no maximum hand size.
{T}: Add {C}.
{2}{U}
Repulse
Instant
Return target creature to its owner's hand.
Draw a card.
{2}{U}{U}
Rewind
Instant
Counter target spell. Untap up to four lands.
{2}{U}
Rhystic Study
Enchantment
Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.
{1}{U}
Rootwater Thief
Creature - Merfolk Rogue
{U}: Rootwater Thief gains flying until end of turn.
Whenever Rootwater Thief deals combat damage to a player, you may pay {2}. If you do, search that player's library for a card and exile it, then the player shuffles.
1 /
2
{1}{U}
Saprazzan Heir
Creature - Merfolk
Whenever Saprazzan Heir becomes blocked, you may draw three cards.
1 /
1
{U}
Seal of Removal
Enchantment
Sacrifice Seal of Removal: Return target creature to its owner's hand.
--
Soldevi Excavations
Land
If Soldevi Excavations would enter the battlefield, sacrifice an untapped Island instead. If you do, put Soldevi Excavations onto the battlefield. If you don't, put it into its owner's graveyard.
{T}: Add {C}{U}.
{1}, {T}: Scry 1.
{2}{U}{U}
Stinging Barrier
Creature - Wall
Defender (This creature can't attack.)
{U}, {T}: Stinging Barrier deals 1 damage to any target.
0 /
4
{X}{2}{U}
Stroke of Genius
Instant
Target player draws X cards.
{2}{U}
Thirst
Enchantment - Aura
Enchant creature
When Thirst enters the battlefield, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
At the beginning of your upkeep, sacrifice Thirst unless you pay {U}.
{1}{U}{U}
Thunder Wall
Creature - Wall
Defender (This creature can't attack.)
Flying
{U}: Thunder Wall gets +1/+1 until end of turn.
0 /
2
{8}{U}{U}
Time Stretch
Sorcery
Target player takes two extra turns after this one.
{3}{U}
Touch of Invisibility
Sorcery
Target creature can't be blocked this turn.
Draw a card.
{1}{U}{U}
Undo
Sorcery
Return two target creatures to their owners' hands.
{2}{U}
Vodalian Illusionist
Creature - Merfolk Wizard
{U}{U}, {T}: Target creature phases out. (While it's phased out, it's treated as though it doesn't exist. It phases in before its controller untaps during their next untap step.)
2 /
2
{U}{U}
Wall of Kelp
Creature - Plant Wall
Defender (This creature can't attack.)
{U}{U}, {T}: Create a 0/1 blue Plant Wall creature token with defender named Kelp.
0 /
3
{1}{U}
Wall of Tears
Creature - Wall
Defender (This creature can't attack.)
Whenever Wall of Tears blocks a creature, return that creature to its owner's hand at end of combat.
0 /
4
{1}{U}{U}
Wall of Water
Creature - Wall
Defender (This creature can't attack.)
{U}: Wall of Water gets +1/+0 until end of turn.
0 /
5
{3}{U}
Wash Out
Sorcery
Return all permanents of the color of your choice to their owners' hands.
{3}{U}{U}
Water Elemental
Creature - Elemental
5 /
4
{1}{U}
Waterfront Bouncer
Creature - Merfolk Spellshaper
{U}, {T}, Discard a card: Return target creature to its owner's hand.
1 /
1
{U}
Whispers of the Muse
Instant
Buyback {5} (You may pay an additional {5} as you cast this spell. If you do, put this card into your hand as it resolves.)
Draw a card.
{3}{U}
Wonder
Creature - Incarnation
Flying
As long as Wonder is in your graveyard and you control an Island, creatures you control have flying.
2 /
2
{3}{U}
Wormfang Crab
Creature - Nightmare Crab
Wormfang Crab can't be blocked.
When Wormfang Crab enters the battlefield, an opponent chooses a permanent you control other than Wormfang Crab and exiles it.
When Wormfang Crab leaves the battlefield, return the exiled card to the battlefield under its owner's control.