Change the text of target spell or permanent by replacing all instances of one color word with another. (This effect lasts indefinitely.)

Flashback {1}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

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

Choose one --

• Counter target red spell.

• Destroy target red permanent.

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.

Red spells cost {2} more to cast.

Change the text of target spell or permanent by replacing all instances of one color word with another or one basic land type with another until end of turn.

Draw a card.

{1}{U}: Counter target red spell.

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."

Choose one --

• Destroy target red permanent.

• Return target Mountain to its owner's hand.

Change the text of target spell or permanent by replacing all instances of one color word with another.

Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)

Choose one --

• Counter target spell if it's red.

• Destroy target permanent if it's red.

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

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.

Change the text of target permanent by replacing all instances of one color word with another or one basic land type with another. (For example, you may change "nonblack creature" to "nongreen creature" or "forestwalk" to "islandwalk." This effect lasts indefinitely.)

As Shifting Sky enters the battlefield, choose a color.

All nonland permanents are the chosen color.

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.)

Choose one --

• Change the text of target spell or permanent by replacing all instances of one basic land type with another. (This effect lasts indefinitely.)

• Change the text of target spell or permanent by replacing all instances of one color word with another. (This effect lasts indefinitely.)

Entwine {2} (Choose both if you pay the entwine cost.)

As Swirl the Mists enters the battlefield, choose a color word.

All instances of color words in the text of spells and permanents are changed to the chosen color word.

Change the text of target permanent by replacing all instances of one color word with another or one basic land type with another until end of turn.

Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

Buyback {2} (You may pay an additional {2} as you cast this spell. If you do, put this card into your hand as it resolves.)

Change the text of target permanent by replacing all instances of one color word with another or one basic land type with another until end of turn. (For example, you may change "nonred creature" to "nongreen creature" or "plainswalk" to "swampwalk.")

When Wrath of Marit Lage enters the battlefield, tap all red creatures.

Red creatures don't untap during their controllers' untap steps.