Return all attacking creatures to their owner's hand.
{2}
Arcane Signet
Artifact
{T}: Add one mana of any color in your commander's color identity.
{1}{U}
Baral, Chief of Compliance
Legendary Creature - Human Wizard
Instant and sorcery spells you cast cost {1} less to cast.
Whenever a spell or ability you control counters a spell, you may draw a card. If you do, discard a card.
1 /
3
{2}{U}{U}
Blind Seer
Legendary Creature - Human Wizard
{1}{U}: Target spell or permanent becomes the color of your choice until end of turn.
3 /
3
{U}
Blue Elemental Blast
Instant
Choose one --
• Counter target red spell.
• Destroy target red permanent.
{U}
Brainstorm
Instant
Draw three cards, then put two cards from your hand on top of your library in any order.
{6}
Caged Sun
Artifact
As Caged Sun enters the battlefield, choose a color.
Creatures you control of the chosen color get +1/+1.
Whenever a land's ability causes you to add one or more mana of the chosen color, add one additional mana of that color.
{1}{U}{U}
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."
* /
3
{1}{U}
Cerulean Drake
Creature - Drake
Flying
Protection from red (This creature can't be blocked, targeted, dealt damage, enchanted, or equipped by anything red.)
Sacrifice Cerulean Drake: Counter target spell that targets you.
1 /
1
{2}{U}
Ceta Sanctuary
Enchantment
At the beginning of your upkeep, if you control a red or green permanent, draw a card, then discard a card. If you control a red permanent and a green permanent, instead draw two cards, then discard a card.
{3}{U}
Chameleon Spirit
Creature - Illusion Spirit
As Chameleon Spirit enters the battlefield, choose a color.
Chameleon Spirit's power and toughness are each equal to the number of permanents of the chosen color your opponents control.
* /
*
{2}{U}{U}
Charix, the Raging Isle
Legendary Creature - Leviathan Crab
Spells your opponents cast that target Charix, the Raging Isle cost {2} more to cast.
{3}: Charix gets +X/-X until end of turn, where X is the number of Islands you control.
0 /
17
{1}{U}
Chill
Enchantment
Red spells cost {2} more to cast.
{1}{U}
Coast Watcher
Creature - Bird Soldier
Flying, protection from green
1 /
1
{3}
Commander's Sphere
Artifact
{T}: Add one mana of any color in your commander's color identity.
Sacrifice Commander's Sphere: Draw a card.
{2}{U}
Compulsive Research
Sorcery
Target player draws three cards. Then that player discards two cards unless they discard a land card.
{2}{U}
Consign to Dream
Instant
Return target permanent to its owner's hand. If that permanent is red or green, put it on top of its owner's library instead.
{U}
Coral Net
Enchantment - Aura
Enchant green or white creature
Enchanted creature has "At the beginning of your upkeep, sacrifice this creature unless you discard a card."
{U}{U}
Counterspell
Instant
Counter target spell.
{3}{U}{U}
Cowardice
Enchantment
Whenever a creature becomes the target of a spell or ability, return that creature to its owner's hand. (It won't be affected by the spell or ability.)
{3}{U}
Deep Analysis
Sorcery
Target player draws two cards.
Flashback--{1}{U}, Pay 3 life. (You may cast this card from your graveyard for its flashback cost. Then exile it.)
{6}{U}
Dismiss into Dream
Enchantment
Each creature your opponents control is an Illusion in addition to its other types and has "When this creature becomes the target of a spell or ability, sacrifice it."
{2}
Distorting Lens
Artifact
{T}: Target permanent becomes the color of your choice until end of turn.
{2}{U}
Douse
Enchantment
{1}{U}: Counter target red spell.
{1}{U}
Dramatic Reversal
Instant
Untap all nonland permanents you control.
{U}
Dream Coat
Enchantment - Aura
Enchant creature
{0}: Enchanted creature becomes the color or colors of your choice. Activate only once each turn.
{2}{U}{U}
Dream Tides
Enchantment
Creatures don't untap during their controllers' untap steps.
At the beginning of each player's upkeep, that player may choose any number of tapped nongreen creatures they control and pay {2} for each creature chosen this way. If the player does, untap those creatures.
{1}{U}
Encase in Ice
Enchantment - Aura
Flash (You may cast this spell any time you could cast an instant.)
Enchant red or green creature
When Encase in Ice enters the battlefield, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
{U}
Essence Leak
Enchantment - Aura
Enchant permanent
As long as enchanted permanent is red or green, it has "At the beginning of your upkeep, sacrifice this permanent unless you pay its mana cost."
{3}{U}
Ether Well
Instant
Put target creature on top of its owner's library. If that creature is red, you may put it on the bottom of its owner's library instead.
{U}
Flash Flood
Instant
Choose one --
• Destroy target red permanent.
• Return target Mountain to its owner's hand.
{1}{U}
Flashfreeze
Instant
Counter target red or green spell.
{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
{X}{U}{U}{U}
Gadwick, the Wizened
Legendary Creature - Human Wizard
When Gadwick, the Wizened enters the battlefield, draw X cards.
Whenever you cast a blue spell, tap target nonland permanent an opponent controls.
3 /
3
{1}{U}
Gainsay
Instant
Counter target blue spell.
{5}
Gauntlet of Power
Artifact
As Gauntlet of Power enters the battlefield, choose a color.
Creatures of the chosen color get +1/+1.
Whenever a basic land is tapped for mana of the chosen color, its controller adds an additional one mana of that color.
{5}
Gilded Lotus
Artifact
{T}: Add three mana of any one color.
{5}{U}
Govern the Guildless
Sorcery
Gain control of target monocolored creature.
Forecast -- {1}{U}, Reveal Govern the Guildless from your hand: Target creature becomes the color or colors of your choice until end of turn. (Activate only during your upkeep and only once each turn.)
{3}
Heartstone
Artifact
Activated abilities of creatures cost {1} less to activate. This effect can't reduce the mana in that cost to less than one mana.
{2}{U}
Hibernation
Instant
Return all green permanents to their owners' hands.
{2}{U}
High Seas
Enchantment
Red creature spells and green creature spells cost {1} more to cast.
{U}
High Tide
Instant
Until end of turn, whenever a player taps an Island for mana, that player adds an additional {U}.
{2}{U}{U}
Homarid Shaman
Creature - Homarid Shaman
{U}: Tap target green creature.
2 /
1
{U}
Hydroblast
Instant
Choose one --
• Counter target spell if it's red.
• Destroy target permanent if it's red.
{2}{U}
Insight
Enchantment
Whenever an opponent casts a green spell, you draw a card.
--
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}.)
{1}{U}
Jaded Response
Instant
Counter target spell if it shares a color with a creature you control.
{4}{U}{U}
King Crab
Creature - Crab
{1}{U}, {T}: Put target green creature on top of its owner's library.
4 /
5
{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
{4}
Machine God's Effigy
Artifact
You may have Machine God's Effigy enter the battlefield as a copy of any creature on the battlefield, except it's an artifact and it has "{T}: Add {U}." (It's not a creature.)
{T}: Add {U}.
{3}{U}
Master of Waves
Creature - Merfolk Wizard
Protection from red
Elemental creatures you control get +1/+1.
When Master of Waves enters the battlefield, create a number of 1/0 blue Elemental creature tokens equal to your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)
2 /
1
{2}{U}
Midnight Clock
Artifact
{T}: Add {U}.
{2}{U}: Put an hour counter on Midnight Clock.
At the beginning of each upkeep, put an hour counter on Midnight Clock.
When the twelfth hour counter is put on Midnight Clock, shuffle your hand and graveyard into your library, then draw seven cards. Exile Midnight Clock.
{U}
Mind Harness
Enchantment - Aura
Enchant red or green creature
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.)
You control enchanted creature.
{1}{U}
Neutralizing Blast
Instant
Counter target multicolored spell.
{5}{U}{U}
Nezahal, Primal Tide
Legendary Creature - Elder Dinosaur
This spell can't be countered.
You have no maximum hand size.
Whenever an opponent casts a noncreature spell, draw a card.
Discard three cards: Exile Nezahal, Primal Tide. Return it to the battlefield tapped under its owner's control at the beginning of the next end step.
7 /
7
{4}
Nyx Lotus
Legendary Artifact
Nyx Lotus enters the battlefield tapped.
{T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)
{1}{U}
Ray of Frost
Enchantment - Aura
Flash
Enchant creature
When Ray of Frost enters the battlefield, if enchanted creature is red, tap it.
As long as enchanted creature is red, it loses all abilities.
Enchanted creature doesn't untap during its controller's untap step.
--
Reliquary Tower
Land
You have no maximum hand size.
{T}: Add {C}.
{1}{U}
Resculpt
Instant
Exile target artifact or creature. Its controller creates a 4/4 blue and red Elemental creature token.
{1}{U}
Scour All Possibilities
Sorcery
Scry 2, then draw a card.
Flashback {4}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
{3}
Scuttlemutt
Artifact Creature - Scarecrow
{T}: Add one mana of any color.
{T}: Target creature becomes the color or colors of your choice until end of turn.
2 /
2
{2}{U}
Shifting Sky
Enchantment
As Shifting Sky enters the battlefield, choose a color.
All nonland permanents are the chosen color.
{2}{U}{U}
Sleep
Sorcery
Tap all creatures target player controls. Those creatures don't untap during that player's next untap step.
{1}
Sol Ring
Artifact
{T}: Add {C}{C}.
{2}{U}
Solve the Equation
Sorcery
Search your library for an instant or sorcery card, reveal it, put it into your hand, then shuffle.
{4}{U}{U}
Sublime Epiphany
Instant
Choose one or more --
• Counter target spell.
• Counter target activated or triggered ability.
• Return target nonland permanent to its owner's hand.
• Create a token that's a copy of target creature you control.
• Target player draws a card.
{1}{U}
Sway of Illusion
Instant
Any number of target creatures become the color of your choice until end of turn.
Draw a card.
{2}
Swiftfoot Boots
Artifact - Equipment
Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control.)
Equip {1}
{3}
Sword of Sinew and Steel
Artifact - Equipment
Equipped creature gets +2/+2 and has protection from black and from red.
Whenever equipped creature deals combat damage to a player, destroy up to one target planeswalker and up to one target artifact.
Equip {2}
{2}{U}{U}
Talrand, Sky Summoner
Legendary Creature - Merfolk Wizard
Whenever you cast an instant or sorcery spell, create a 2/2 blue Drake creature token with flying.
2 /
2
--
Temple of the False God
Land
{T}: Add {C}{C}. Activate only if you control five or more lands.
--
Terrain Generator
Land
{T}: Add {C}.
{2}, {T}: You may put a basic land card from your hand onto the battlefield tapped.
--
Terramorphic Expanse
Land
{T}, Sacrifice Terramorphic Expanse: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
{U}
The Blackstaff of Waterdeep
Legendary Artifact
You may choose not to untap The Blackstaff of Waterdeep during your untap step.
Animate Walking Statue -- {1}{U}, {T}: Another target nontoken artifact you control becomes a 4/4 artifact creature for as long as The Blackstaff of Waterdeep remains tapped. Activate only as a sorcery.
{6}{U}{U}{U}
The Magic Mirror
Legendary Artifact
This spell costs {1} less to cast for each instant and sorcery card in your graveyard.
You have no maximum hand size.
At the beginning of your upkeep, put a knowledge counter on The Magic Mirror, then draw a card for each knowledge counter on The Magic Mirror.
{1}{U}{U}
Tidal Control
Enchantment
Cumulative upkeep {2} (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.)
Pay 2 life or {2}: Counter target red or green spell. Any player may activate this ability.
{U}
Tidal Visionary
Creature - Merfolk Wizard
{T}: Target creature becomes the color of your choice until end of turn.
1 /
1
{U}{U}
Tidebinder Mage
Creature - Merfolk Wizard
When Tidebinder Mage enters the battlefield, tap target red or green creature an opponent controls. That creature doesn't untap during its controller's untap step for as long as you control Tidebinder Mage.
2 /
2
{2}{U}
Trophy Mage
Creature - Human Wizard
When Trophy Mage enters the battlefield, you may search your library for an artifact card with mana value 3, reveal it, put it into your hand, then shuffle.
2 /
2
{1}{U}
Vodalian Mystic
Creature - Merfolk Wizard
{T}: Target instant or sorcery spell becomes the color of your choice.
1 /
1
{3}{U}
Wash Out
Sorcery
Return all permanents of the color of your choice to their owners' hands.
{2}{U}
Well-Laid Plans
Enchantment
Prevent all damage that would be dealt to a creature by another creature if they share a color.
{4}{U}
Whimwader
Creature - Elemental
Whimwader can't attack unless defending player controls a blue permanent.
6 /
4
{3}{U}{U}
Willbreaker
Creature - Human Wizard
Whenever a creature an opponent controls becomes the target of a spell or ability you control, gain control of that creature for as long as you control Willbreaker.
2 /
3
{2}{U}
Winged Words
Sorcery
This spell costs {1} less to cast if you control a creature with flying.
Draw two cards.
{3}{U}{U}
Wrath of Marit Lage
Enchantment
When Wrath of Marit Lage enters the battlefield, tap all red creatures.
Red creatures don't untap during their controllers' untap steps.