Have

Well-Laid Plans

Prevent all damage that would be dealt to a creature by another creature if they share a color.

Dismiss into Dream

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."

Jaded Response

Counter target spell if it shares a color with a creature you control.

Prodigal Sorcerer

{T}: This creature deals 1 damage to any target.

Information Dealer

{T}: Look at the top X cards of your library, where X is the number of Wizards on the battlefield, then put them back in any order.

Hydroblast

Choose one —
• Counter target spell if it's red.
• Destroy target permanent if it's red.

Douse

Scuttlemutt

{T}: Add one mana of any color.
{T}: Target creature becomes the color or colors of your choice until end of turn.

Riptide

Temporal Adept

{U}{U}{U}, {T}: Return target permanent to its owner's hand.

Coast Watcher

Long-Term Plans

Search your library for a card, then shuffle and put that card third from the top.

Tidal Control

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.

Homarid Shaman

Portent

Look at the top three cards of target player's library, then put them back in any order. You may have that player shuffle.
Draw a card at the beginning of the next turn's upkeep.

Sleight of Mind

Change the text of target spell or permanent by replacing all instances of one color word with another. (For example, you may change "target black spell" to "target blue spell." This effect lasts indefinitely.)

Supreme Inquisitor

Tap five untapped Wizards you control: Search target player's library for up to five cards and exile them. Then that player shuffles.

Puppeteer

{U}, {T}: You may tap or untap target creature.

Willbreaker

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 this creature.

Flash Flood

Choose one —
• Destroy target red permanent.
• Return target Mountain to its owner's hand.

Fylamarid

Flying
This creature can't be blocked by blue creatures.
{U}: Target creature becomes blue until end of turn.

Sapphire Medallion

Blue spells you cast cost {1} less to cast.

Blind Seer

{1}{U}: Target spell or permanent becomes the color of your choice until end of turn.

Omen Hawker

{T}: Add {C}{U}. Spend this mana only to activate abilities.

Shifting Sky

As this enchantment enters, choose a color.
All nonland permanents are the chosen color.

Vodalian Mystic

{T}: Target instant or sorcery spell becomes the color of your choice.

Indigo Faerie

Flying
{U}: Target permanent becomes blue in addition to its other colors until end of turn.

Squeeze

Sandbar Merfolk

Cycling {2} ({2}, Discard this card: Draw a card.)

Riptide Director

{2}{U}{U}, {T}: Draw a card for each Wizard you control.

Metathran Transport

Wash Out

Return all permanents of the color of your choice to their owners' hands.

Tidal Visionary

{T}: Target creature becomes the color of your choice until end of turn.

Prohibit

Kicker {2} (You may pay an additional {2} as you cast this spell.)
Counter target spell if its mana value is 2 or less. If this spell was kicked, counter that spell if its mana value is 4 or less instead.

Mana Maze

Players can't cast spells that share a color with the spell most recently cast this turn.

Riptide Laboratory

{T}: Add {C}.
{1}{U}, {T}: Return target Wizard you control to its owner's hand.

Ghosthelm Courier

You may choose not to untap this creature during your untap step.
{2}{U}, {T}: Target Wizard creature gets +2/+2 and has shroud for as long as this creature remains tapped. (It can't be the target of spells or abilities.)

Tidebinder Mage

When this creature enters, 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 this creature.

Aven Smokeweaver

Weatherseed Faeries

Heartstone

Activated abilities of creatures cost {1} less to activate. This effect can't reduce the mana in that cost to less than one mana.

Arcane Denial

Counter target spell. Its controller may draw up to two cards at the beginning of the next turn's upkeep.
You draw a card at the beginning of the next turn's upkeep.

Hibernation

Return all green permanents to their owners' hands.

Hunting Drake

Flying
When this creature enters, put target red or green creature on top of its owner's library.

Keeper of the Mind

{U}, {T}: Choose target opponent who has at least two more cards in hand than you do as you activate this ability. Draw a card.

Lat-Nam's Legacy

Shuffle a card from your hand into your library. If you do, draw two cards at the beginning of the next turn's upkeep.

Island

Memory Lapse

Counter target spell. If that spell is countered this way, put it on top of its owner's library instead of into that player's graveyard.

Barrin's Unmaking

Return target permanent to its owner's hand if that permanent shares a color with the most common color among all permanents or a color tied for most common.

Ether Well

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.

Cowardice

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.)

Willbender

Morph {1}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
When this creature is turned face up, change the target of target spell or ability with a single target.

Archivist

Flashfreeze

Distorting Lens

{T}: Target permanent becomes the color of your choice until end of turn.

Unifying Theory

Whenever a player casts a spell, that player may pay {2}. If the player does, they draw a card.

Treetop Sentinel

Master of Waves

Protection from red
Elemental creatures you control get +1/+1.
When this creature enters, 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.)

King Crab

{1}{U}, {T}: Put target green creature on top of its owner's library.

Narwhal

Counterspell

Rayne, Academy Chancellor

Whenever you or a permanent you control becomes the target of a spell or ability an opponent controls, you may draw a card. You may draw an additional card if Rayne is enchanted.

Sleight of Hand

Look at the top two cards of your library. Put one of them into your hand and the other on the bottom of your library.