Long-Term Plans

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

Blue Elemental Blast

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

Don't Have

Mana Maze

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

Scuttlemutt

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

Douse

Insight

Whenever an opponent casts a green spell, you draw a card.

Shifting Sky

As Shifting Sky enters, choose a color.
All nonland permanents are the chosen color.

Future Sight

Play with the top card of your library revealed.
You may play lands and cast spells from the top of your library.

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."

Llawan, Cephalid Empress

When Llawan, Cephalid Empress enters, return all blue creatures your opponents control to their owners' hands.
Your opponents can't cast blue creature spells.

Sol Ring

Withering Gaze

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

Jaded Response

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

Baleful Stare

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

Archaeomancer

When Archaeomancer enters, return target instant or sorcery card from your graveyard to your hand.

Vodalian Mystic

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

Blind Seer

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

Tidal Visionary

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

Flash Flood

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

Counterspell

Wash Out

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

Well-Laid Plans

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

King Crab

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

Sway of Illusion

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

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.)

Hibernation

Return all green permanents to their owners' hands.

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 Willbreaker.

Swiftfoot Boots

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control. It can attack and {T} no matter when it came under your control.)
Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

Hydroblast

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