Humility

All creatures lose all abilities and have base power and toughness 1/1.

Mana Breach

Whenever a player casts a spell, that player returns a land they control to its owner's hand.

Catastrophe

Destroy all lands or all creatures. Creatures destroyed this way can't be regenerated.

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 this card, destroy all lands.

Boil

Boiling Seas

Narset, Enlightened Master

First strike, hexproof
Whenever Narset attacks, exile the top four cards of your library. Until end of turn, you may cast noncreature spells from among those cards without paying their mana costs.

Ravages of War

Jokulhaups

Destroy all artifacts, creatures, and lands. They can't be regenerated.

Divine Intervention

This enchantment enters with two intervention counters on it.
At the beginning of your upkeep, remove an intervention counter from this enchantment.
When you remove the last intervention counter from this enchantment, the game is a draw.

Wildfire

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

Epicenter

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

Flashfires

Global Ruin

Each player chooses from the lands they control a land of each basic land type, then sacrifices the rest.

Obliterate

This spell can't be countered.
Destroy all artifacts, creatures, and lands. They can't be regenerated.

Armageddon

Teferi's Protection

Until your next turn, your life total can't change and you gain protection from everything. All permanents you control phase out. (While they're phased out, they're treated as though they don't exist. They phase in before you untap during your untap step.)
Exile Teferi's Protection.

Thoughts of Ruin

Each player sacrifices a land of their choice for each card in your hand.

Devastation

Wake of Destruction

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

Impending Disaster

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

Apocalypse

Exile all permanents. You discard your hand.

Burning Sands

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

Tectonic Break

Each player sacrifices X lands of their choice.

Ruination

Sunder

Farewell

Choose one or more —
• Exile all artifacts.
• Exile all creatures.
• Exile all enchantments.
• Exile all graveyards.

Blood Moon

Worldfire

Exile all permanents. Exile all cards from all hands and graveyards. Each player's life total becomes 1.

Smokestack

At the beginning of your upkeep, you may put a soot counter on this artifact.
At the beginning of each player's upkeep, that player sacrifices a permanent of their choice for each soot counter on this artifact.