Nonbasic lands are Mountains.

Whenever a player taps a nonbasic land for mana, this enchantment deals 1 damage to that player.

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

Flash If a source would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

If a source you control would deal damage to a permanent or player, it deals triple that damage to that permanent or player instead.

At the beginning of each player's end step, if that player didn't cast a spell this turn, this enchantment deals 2 damage to that player.

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

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

If a red or artifact source you control would deal damage to an opponent or a permanent an opponent controls, it deals that much damage plus 1 instead.

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

At the beginning of each player's upkeep, this enchantment deals 1 damage to them. Whenever a player casts a spell, if no mana was spent to cast that spell, this enchantment deals 5 damage to that player. {R}: Your opponents can't gain life this turn.

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

At the beginning of each player's upkeep, this enchantment deals 2 damage to that player. If a player would gain life, that player gains no life instead.

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

Whenever a land enters, this artifact deals 2 damage to that land's controller.

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

Indestructible (Effects that say "destroy" don't destroy this artifact.) {T}: Add one mana of any color.

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

This artifact enters tapped. {T}: Add {R}.

{T}: Add {R}. Put a stash counter on this artifact. {T}, Sacrifice this artifact: Add X mana of any one color, where X is the number of stash counters on this artifact.

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

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

Choose one — • Abrade deals 3 damage to target creature. • Destroy target artifact.

Destroy all Islands.

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

Seismic Strike deals damage to target creature equal to the number of Mountains you control.

Indestructible {T}: Add {C}.

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

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

({T}: Add {R}.)

{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.)

When this creature dies, each player sacrifices a land of their choice.

First strike When this creature enters, exile a card from a graveyard. Whenever a player plays a land or casts a spell, if it shares a card type with the exiled card, this creature deals 2 damage to that player.

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, you may cast it without paying its mana cost. It has haste.) Whenever a time counter is removed from this card while it's exiled, destroy target nonbasic land.

{T}: Destroy target land unless its controller has this creature deal 2 damage to them.

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

{T}: Heartless Hidetsugu deals damage to each player equal to half that player's life total, rounded down.

Whenever an opponent activates an ability of an artifact, creature, or land that isn't a mana ability, this creature deals 1 damage to that player. {3}{R}{R}: This creature gets +3/+3 and gains menace until end of turn.

Imprint — When this creature enters, exile target land. Whenever a land an opponent controls with the same name as the exiled card enters, this creature deals 2 damage to that player.

{T}: Add {R}.

Nonbasic lands are Mountains.

{1}{R}, {T}: Put a mine counter on target land. Whenever a land with a mine counter on it becomes tapped, destroy it. When this creature leaves the battlefield, remove all mine counters from all lands.

{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 this creature has left the battlefield.)

Menace Players can't gain life. Whenever another creature enters, this creature deals 1 damage to that creature's controller.

Flying Whenever a player casts a spell, they lose 1 life for each spell they've cast this turn.

Whenever a player casts a spell, if it's not their turn, this creature deals 4 damage to them.

If a source you control would deal noncombat damage to an opponent or a permanent an opponent controls, it deals double that damage to that player or permanent instead. {1}{R/P}{R/P}, Discard two cards: Put an indestructible counter on Solphim. ({R/P} can be paid with either {R} or 2 life.)

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

If a red source you control would deal damage to an opponent or a permanent an opponent controls, it deals that much damage plus 2 instead.

Whenever an opponent taps an artifact for mana, gain control of that artifact until the end of your next turn.

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

{X}{X}{R}, {T}, Sacrifice this creature: Destroy X target lands.

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

Destroy target land. Its controller may search their library for a basic land card, put it onto the battlefield tapped, then shuffle. Draw a card.

Target player sacrifices a land of their choice. Threshold — Each player sacrifices all lands they control instead if seven or more cards are in your graveyard.

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

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.

Each player sacrifices a land of their choice.

Destroy target artifact you don't control. Overload {4}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")