Acidic Soil deals damage to each player equal to the number of lands they control.

Whenever a land enters the battlefield, Ankh of Mishra deals 2 damage to that land's controller.

Each player separates all nontoken lands they control into two piles. For each player, one of their piles is chosen by one of their opponents of their choice. Destroy all lands in the chosen piles. Tap all lands in the other piles.

This spell costs {1} less to cast for each creature on the battlefield.

Blasphemous Act deals 13 damage to each creature.

Nonbasic lands are Mountains.

{T}: Add {C}.

{2}, {T}, Sacrifice Buried Ruin: Return target artifact card from your graveyard to your hand.

Whenever a player taps a nonbasic land for mana, Burning Earth deals 1 damage to that player.

Whenever a creature dies, that creature's controller sacrifices a land.

As Caged Sun enters the battlefield, choose a color.

Creatures you control of the chosen color get +1/+1.

Whenever a land's ability causes you to add one or more mana of the chosen color, add one additional mana of that color.

The owner of target permanent shuffles it into their library, then reveals the top card of their library. If it's a permanent card, they put it onto the battlefield.

At the beginning of each player's end step, Citadel of Pain deals X damage to that player, where X is the number of untapped lands they control.

{T}: Add one mana of any color in your commander's color identity.

Sacrifice Commander's Sphere: Draw a card.

No more than two creatures can attack you each combat.

You may play lands from your graveyard.

Activated abilities of creatures can't be activated.

If a land is tapped for two or more mana, it produces {C} instead of any other type and amount.

Each spell a player casts costs {1} more to cast for each other spell that player has cast this turn.

Indestructible (Effects that say "destroy" don't destroy this artifact.)

{T}: Add one mana of any color.

Detritivore's power and toughness are each equal to the number of nonbasic land cards in your opponents' graveyards.

Suspend X--{X}{3}{R}. X can't be 0. (Rather than cast this card from your hand, you may pay {X}{3}{R} and exile it with X time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost. It has haste.)

Whenever a time counter is removed from Detritivore while it's exiled, destroy target nonbasic land.

Whenever a land is put into a graveyard from the battlefield, Dingus Egg deals 2 damage to that land's controller.

{T}: Add {C}.

{3}, {T}, Sacrifice a land: Destroy target nonbasic land.

{2}{R}, {T}: Destroy target nonbasic land.

Morph {R} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)

Whenever a player casts a spell with mana value 3 or less, Eidolon of the Great Revel deals 2 damage to that player.

Imprint -- When Extraplanar Lens enters the battlefield, you may exile target land you control.

Whenever a land with the same name as the exiled card is tapped for mana, its controller adds one mana of any type that land produced.

{T}: Add one mana of any color that a land an opponent controls could produce.

{T}: Add {C}.

{2}, {T}, Sacrifice Field of Ruin: Destroy target nonbasic land an opponent controls. Each player searches their library for a basic land card, puts it onto the battlefield, then shuffles.

Destroy all nonbasic lands. For each land destroyed this way, its controller may search their library for a basic land card and put it onto the battlefield. Then each player who searched their library this way shuffles.

Each player may play an additional land on each of their turns.

At the beginning of each player's upkeep, if that player has no cards in hand, that player draws three cards.

{T}: Add {C}.

{T}, Sacrifice Ghost Quarter: Destroy target land. Its controller may search their library for a basic land card, put it onto the battlefield, then shuffle.

{T}: Add three mana of any one color.

Kicker {R} (You may pay an additional {R} as you cast this spell.)

Haste

When Goblin Ruinblaster enters the battlefield, if it was kicked, destroy target nonbasic land.

Grim Monolith doesn't untap during your untap step.

{T}: Add {C}{C}{C}.

{4}: Untap Grim Monolith.

Whenever an opponent activates an ability of an artifact, creature, or land on the battlefield, if it isn't a mana ability, Harsh Mentor deals 2 damage to that player.

At the beginning of your upkeep, if there are seven or more lands on the battlefield, sacrifice Impending Disaster and destroy all lands.

Imprint -- When Invader Parasite enters the battlefield, exile target land.

Whenever a land with the same name as the exiled card enters the battlefield under an opponent's control, Invader Parasite deals 2 damage to that player.

{T}: Add {R}.

When Keldon Firebombers enters the battlefield, each player sacrifices all lands they control except for three.

If an opponent had two or more lands enter the battlefield under their control this turn, you may pay {3}{R}{R} rather than pay this spell's mana cost.

Destroy two target lands. Lavaball Trap deals 4 damage to each creature.

Suspend 3--{0} (Rather than cast this card from your hand, pay {0} and exile it with three time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost.)

{T}, Sacrifice Lotus Bloom: Add three mana of any one color.

Nonbasic lands are Mountains.

{1}{R}, {T}, Sacrifice Magus of the Wheel: Each player discards their hand, then draws seven cards.

Mana Vault doesn't untap during your untap step.

At the beginning of your upkeep, you may pay {4}. If you do, untap Mana Vault.

At the beginning of your draw step, if Mana Vault is tapped, it deals 1 damage to you.

{T}: Add {C}{C}{C}.

Whenever a land an opponent controls is tapped for mana, tap all lands that player controls that could produce any type of mana that land could produce.

Whenever a player taps a land for mana, Manabarbs deals 1 damage to that player.

Creatures with power 3 or greater don't untap during their controllers' untap steps.

Destroy target land. If that land was nonbasic, Molten Rain deals 2 damage to the land's controller.

{T}: Add {C}.

{2}, {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

{1}{R}{R}: Put a blaze counter on target land without a blaze counter on it. For as long as that land has a blaze counter on it, it has "At the beginning of your upkeep, this land deals 1 damage to you." (The land continues to burn after Obsidian Fireheart has left the battlefield.)

Destroy target artifact or land. It can't be regenerated.

Whenever a player taps a land for mana, if it's not that player's turn, destroy that land.

Price of Progress deals damage to each player equal to twice the number of nonbasic lands that player controls.

Whenever a player casts a spell with mana value 3 or less, Pyrostatic Pillar deals 2 damage to that player.

Menace

Players can't gain life.

Whenever another creature enters the battlefield, Rampaging Ferocidon deals 1 damage to that creature's controller.

Whenever a creature is dealt damage, Repercussion deals that much damage to that creature's controller.

Destroy target land, then Roiling Terrain deals damage to that land's controller equal to the number of land cards in that player's graveyard.

Destroy all nonbasic lands.

At the beginning of your upkeep, you may put a verse counter on Rumbling Crescendo.

{R}, Sacrifice Rumbling Crescendo: Destroy up to X target lands, where X is the number of verse counters on Rumbling Crescendo.

{1}{R}, Sacrifice a creature: Destroy target nonbasic land.

Players can't untap more than one creature during their untap steps.

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

{T}: Add {C}{C}.

Whenever a player casts a spell, Spellshock deals 2 damage to that player.

At the beginning of each player's end step, that player sacrifices an untapped land.

Each player may play an additional land during each of their turns.

Whenever a land is tapped for mana, return it to its owner's hand.

Your opponents can't search libraries.

If an opponent would begin an extra turn, that player skips that turn instead.

{T}: Add {C}.

{T}, Sacrifice Strip Mine: Destroy target land.

At the beginning of each player's upkeep, Sulfuric Vortex deals 2 damage to that player.

If a player would gain life, that player gains no life instead.

{T}: Add {C}.

{1}, {T}, Sacrifice Tectonic Edge: Destroy target nonbasic land. Activate only if an opponent controls four or more lands.

Whenever a land enters the battlefield, tap all lands its controller controls.

You have no maximum hand size.

{T}: Add {C}.

{T}: Add {C}{C}{C}.

Whenever a land enters the battlefield under an opponent's control, if that player had another land enter the battlefield under their control this turn, Tunnel Ignus deals 3 damage to that player.

Valakut, the Molten Pinnacle enters the battlefield tapped.

Whenever a Mountain enters the battlefield under your control, if you control at least five other Mountains, you may have Valakut, the Molten Pinnacle deal 3 damage to any target.

{T}: Add {R}.

{1}{R}, {T}: Destroy target artifact. Viashino Heretic deals damage to that artifact's controller equal to the artifact's mana value.

Destroy target land and all other lands with the same name as that land.

Whenever an opponent taps a land for mana, tap all lands that player controls.

If a creature an opponent controls attacks, all creatures that opponent controls attack if able.

{T}: Add {C}.

{T}, Sacrifice Wasteland: Destroy target nonbasic land.

Each player discards their hand, then draws seven cards.

Each player sacrifices four lands. Wildfire deals 4 damage to each creature.

As long as Winter Orb is untapped, players can't untap more than one land during their untap steps.

Worn Powerstone enters the battlefield tapped.

{T}: Add {C}{C}.

Whenever a land enters the battlefield, Zo-Zu the Punisher deals 2 damage to that land's controller.