Blind Seer

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

Blue Elemental Blast

Choose one —
• Counter target red spell.
• Destroy target red permanent.

Defiler of Dreams

Flying
As an additional cost to cast blue permanent spells, you may pay 2 life. Those spells cost {U} less to cast if you paid life this way. This effect reduces only the amount of blue mana you pay.
Whenever you cast a blue permanent spell, draw a card.

Flash Flood

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

Negate

Well-Laid Plans

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

Azami, Lady of Scrolls

Tap an untapped Wizard you control: Draw a card.

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."

Resculpt

Exile target artifact or creature. Its controller creates a 4/4 blue and red Elemental creature token.

Borrowing 100,000 Arrows

Draw a card for each tapped creature target opponent controls.

Unwind

Counter target noncreature spell. Untap up to three lands.

Distorting Lens

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

Gainsay

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.

Shell Skulkin

{3}: Target blue creature gains shroud until end of turn. (It can't be the target of spells or abilities.)

Sanctuary Blade

As Sanctuary Blade becomes attached to a creature, choose a color.
Equipped creature gets +2/+0 and has protection from the last chosen color.
Equip {3}

King Crab

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

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.

Tribute Mage

When Tribute Mage enters, you may search your library for an artifact card with mana value 2, reveal that card, put it into your hand, then shuffle.

Wash Out

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

Withering Gaze

Target opponent reveals their hand. You draw a card for each Forest and green card in it.

Frantic Search

Draw two cards, then discard two cards. Untap up to three lands.

Flashfreeze

Jaded Response

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

Run Away Together

Choose two target creatures controlled by different players. Return those creatures to their owners' hands.

Shifting Sky

As Shifting Sky 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.

Scuttlemutt

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

Body of Knowledge

Body of Knowledge's power and toughness are each equal to the number of cards in your hand.
You have no maximum hand size.
Whenever Body of Knowledge is dealt damage, draw that many cards.

Baleful Stare

Target opponent reveals their hand. You draw a card for each Mountain and red card in it.

Apprentice Wizard

Cancel

Dispel

Homarid Shaman

Island

Sway of Illusion

Any number of target creatures become the color of your choice until end of turn.
Draw a card.

Flow of Knowledge

Draw a card for each Island you control, then discard two cards.

Foil

You may discard an Island card and another card rather than pay this spell's mana cost.
Counter target spell.

Aether Gust

Choose target spell or permanent that's red or green. Its owner puts it on their choice of the top or bottom of their library.

Trophy Mage

When Trophy Mage enters, you may search your library for an artifact card with mana value 3, reveal it, put it into your hand, then shuffle.