Flashfires

Raze

As an additional cost to cast this spell, sacrifice a land.
Destroy target land.

Boiling Seas

Fiery Gambit

Flip a coin until you lose a flip or choose to stop flipping. If you lose a flip, Fiery Gambit has no effect. If you win one or more flips, Fiery Gambit deals 3 damage to target creature. If you win two or more flips, Fiery Gambit deals 6 damage to each opponent. If you win three or more flips, draw nine cards and untap all lands you control.

Territorial Dispute

At the beginning of your upkeep, sacrifice Territorial Dispute unless you sacrifice a land.
Players can't play lands.

Molten Rain

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

Crucible of Worlds

From the Ashes

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.

Keldon Firebombers

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

Seismic Spike

Strip Mine

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

Wake of Destruction

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

Tectonic Break

Bearer of the Heavens

When Bearer of the Heavens dies, destroy all permanents at the beginning of the next end step.

Tectonic Instability

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

Decree of Annihilation

Exile all artifacts, creatures, and lands from the battlefield, all cards from all graveyards, and all cards from all hands.
Cycling {5}{R}{R} ({5}{R}{R}, Discard this card: Draw a card.)
When you cycle Decree of Annihilation, destroy all lands.

Volcanic Awakening

Destroy target land.
Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

Vandalize

Choose one or both —
• Destroy target artifact.
• Destroy target land.

Kormus Bell

All Swamps are 1/1 black creatures that are still lands.

Mana Web

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.

Solfatara

Target player can't play lands this turn.
Draw a card at the beginning of the next turn's upkeep.

Bend or Break

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.

Bust

Boom

Destroy target land you control and target land you don't control.

Boom // Bust

Pulverize

You may sacrifice two Mountains rather than pay this spell's mana cost.
Destroy all artifacts.

Anarchy

Turf Wound

Target player can't play lands this turn.
Draw a card.

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.

Curse of Marit Lage

When Curse of Marit Lage enters, tap all Islands.
Islands don't untap during their controllers' untap steps.

Epicenter

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

Impending Disaster

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

Stone Rain

Destructive Force

Each player sacrifices five lands. Destructive Force deals 5 damage to each creature.

Rite of Ruin

Choose an order for artifacts, creatures, and lands. Each player sacrifices one permanent of the first type, sacrifices two of the second type, then sacrifices three of the third type.