Conversion

At the beginning of your upkeep, sacrifice Conversion unless you pay {W}{W}.
All Mountains are Plains.

Perish

Destroy all green creatures. They can't be regenerated.

Pyroblast

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

Deathmark

Consign to Dream

Return target permanent to its owner's hand. If that permanent is red or green, put it on top of its owner's library instead.

Angel's Feather

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

Reclamation

Black creatures can't attack unless their controller sacrifices a land for each black creature they control that's attacking. (This cost is paid as attackers are declared.)

Kithkin Zealot

When Kithkin Zealot enters, you gain 1 life for each black and/or red permanent target opponent controls.

Mindsparker

First strike (This creature deals combat damage before creatures without first strike.)
Whenever an opponent casts a white or blue instant or sorcery spell, Mindsparker deals 2 damage to that player.

Wurm's Tooth

Whenever a player casts a green spell, you may gain 1 life.

Elephant Grass

Cumulative upkeep {1} (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.)
Black creatures can't attack you.
Nonblack creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.

Yawgmoth's Edict

Whenever an opponent casts a white spell, that player loses 1 life and you gain 1 life.

Compost

Whenever a black card is put into an opponent's graveyard from anywhere, you may draw a card.

Spinal Villain

Infernal Reckoning

Exile target colorless creature. You gain life equal to its power.

Active Volcano

Choose one —
• Destroy target blue permanent.
• Return target Island to its owner's hand.

Karma

At the beginning of each player's upkeep, Karma deals damage to that player equal to the number of Swamps they control.

Insight

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

Dream Tides

Creatures don't untap during their controllers' untap steps.
At the beginning of each player's upkeep, that player may choose any number of tapped nongreen creatures they control and pay {2} for each creature chosen this way. If the player does, untap those creatures.

Royal Decree

Cumulative upkeep {W} (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.)
Whenever a Swamp, Mountain, black permanent, or red permanent becomes tapped, Royal Decree deals 1 damage to that permanent's controller.

Dragon's Claw

Whenever a player casts a red spell, you may gain 1 life.

Monsoon

At the beginning of each player's end step, tap all untapped Islands that player controls and Monsoon deals X damage to the player, where X is the number of Islands tapped this way.

Bereavement

Whenever a green creature dies, its controller discards a card.

Flash of Defiance

Green creatures and white creatures can't block this turn.
Flashback—{1}{R}, Pay 3 life. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Demon's Horn

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

Flooded Woodlands

Green creatures can't attack unless their controller sacrifices a land for each green creature they control that's attacking. (This cost is paid as attackers are declared.)

Honorable Scout

When Honorable Scout enters, you gain 2 life for each black and/or red creature target opponent controls.

Omen of Fire

Return all Islands to their owners' hands. Each player sacrifices a Plains or a white permanent for each white permanent they control.

Ceremonious Rejection

Absolute Grace

All creatures have protection from black.

Jovial Evil

Jovial Evil deals X damage to target opponent, where X is twice the number of white creatures that player controls.

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.

Magistrate's Veto

White creatures and blue creatures can't block.

Heat Wave

Cumulative upkeep {R} (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.)
Blue creatures can't block creatures you control.
Nonblue creatures can't block creatures you control unless their controller pays 1 life for each blocking creature they control.

Exorcist

{1}{W}, {T}: Destroy target black creature.

Glaciers

At the beginning of your upkeep, sacrifice Glaciers unless you pay {W}{U}.
All Mountains are Plains.

Controlled Instincts

Enchant red or green creature
Enchanted creature doesn't untap during its controller's untap step.

Sphere of Duty

If a green source would deal damage to you, prevent 2 of that damage.

Sphere of Grace

If a black source would deal damage to you, prevent 2 of that damage.

Essence Leak

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."

Celestial Purge

Blue Elemental Blast

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

Virtue's Ruin

Sphere of Law

If a red source would deal damage to you, prevent 2 of that damage.

Pygmy Kavu

When Pygmy Kavu enters, draw a card for each black creature your opponents control.

Lifeforce

Breath of Dreams

Cumulative upkeep {U} (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.)
Green creatures have "Cumulative upkeep {1}."

Dread of Night

Sanctimony

Whenever an opponent taps a Mountain for mana, you may gain 1 life.

Anarchy

Light of Day

Havoc

Whenever an opponent casts a white spell, they lose 2 life.

Thelon's Chant

At the beginning of your upkeep, sacrifice Thelon's Chant unless you pay {G}.
Whenever a player puts a Swamp onto the battlefield, Thelon's Chant deals 3 damage to that player unless the player puts a -1/-1 counter on a creature they control.

Putrefaction

Whenever a player casts a green or white spell, that player discards a card.

Chaotic Backlash

Chaotic Backlash deals damage to target player equal to twice the number of white and/or blue permanents they control.

Nature's Ruin

Irini Sengir

Green enchantment spells and white enchantment spells cost {2} more to cast.

Withering Gaze

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

Kraken's Eye

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

Absolute Law

Kor Firewalker

Protection from red
Whenever a player casts a red spell, you may gain 1 life.

Chill

Mind Harness

Enchant red or green creature
Cumulative upkeep {1} (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.)
You control enchanted creature.

Dystopia

Cumulative upkeep—Pay 1 life. (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.)
At the beginning of each player's upkeep, that player sacrifices a green or white permanent.

Guttural Response

Scald

Whenever a player taps an Island for mana, Scald deals 1 damage to that player.

Baleful Stare

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

Flash Flood

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

Stromgald Cabal

{T}, Pay 1 life: Counter target white spell.

Thoughtleech

Whenever an Island an opponent controls becomes tapped, you may gain 1 life.

Sphere of Reason

If a blue source would deal damage to you, prevent 2 of that damage.

Spreading Algae

Enchant Swamp
When enchanted land becomes tapped, destroy it.
When Spreading Algae is put into a graveyard from the battlefield, return Spreading Algae to its owner's hand.

Warmth

Whenever an opponent casts a red spell, you gain 2 life.

Stern Judge

{T}: Each player loses 1 life for each Swamp they control.

Southern Paladin

{W}{W}, {T}: Destroy target red permanent.

Blightbeetle

Protection from green (This creature can't be blocked, targeted, dealt damage, enchanted, or equipped by anything green.)
Creatures your opponents control can't have +1/+1 counters put on them.

Typhoon

Typhoon deals damage to each opponent equal to the number of Islands that player controls.

Hibernation

Return all green permanents to their owners' hands.

Douse

Magnetic Mountain

Blue creatures don't untap during their controllers' untap steps.
At the beginning of each player's upkeep, that player may choose any number of tapped blue creatures they control and pay {4} for each creature chosen this way. If the player does, untap those creatures.

Red Elemental Blast

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

Gloom

White spells cost {3} more to cast.
Activated abilities of white enchantments cost {3} more to activate.