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.)

Whenever a player casts a white spell, you may pay . If you do, you gain 1 life.

Shock deals 2 damage to any target.

Whenever a player casts a blue spell, you may pay . If you do, you gain 1 life.

Enchant creature
Enchanted creature has flying.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

You may tap or untap target artifact, creature, or land.

, , Sacrifice this creature: Destroy target enchantment.

Enchant creature
Enchanted creature gets +1/+2.

Flying
: Add one mana of any color.

Enchant creature
Enchanted creature gets +2/+1.

Destroy target enchantment.

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Whenever enchanted creature deals damage, you gain that much life.

Return target creature to its owner's hand.

You and target opponent each flip a coin. Mana Clash deals 1 damage to each player whose coin comes up tails. Repeat this process until both players' coins come up heads on the same flip.

Choose one —
• Target player gains 3 life.
• Prevent the next 3 damage that would be dealt to any target this turn.

: This creature gets +0/+1 until end of turn.

Whenever a player casts a black spell, you may pay . If you do, you gain 1 life.

Rain of Blades deals 1 damage to each attacking creature.

Blaze deals X damage to any target.

, , Sacrifice this creature: Destroy target artifact.

Enchant creature
Whenever enchanted creature deals damage to an opponent, you may draw a card.

Tremor deals 1 damage to each creature without flying.

: The next time a red source of your choice would deal damage to you this turn, prevent that damage.

: The next time a green source of your choice would deal damage to you this turn, prevent that damage.

Enchant land
Whenever enchanted land is tapped for mana, its controller adds an additional one mana of any color.

: Regenerate this creature. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

All creatures get -1/-1 until end of turn.

This creature can't attack unless a creature with greater power also attacks.
This creature can't block unless a creature with greater power also blocks.

: The next time a blue source of your choice would deal damage to you this turn, prevent that damage.

Counter target creature spell.

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
Enchanted creature has fear. (It can't be blocked except by artifact creatures and/or black creatures.)

Each spell costs more to cast except during its controller's turn.