Destroy all lands.

You destroy four lands you control, then target opponent destroys four lands they control. Then Burning of Xinye deals 4 damage to each creature.

Each player chooses from among the permanents they control an artifact, a creature, an enchantment, and a land, then sacrifices the rest.

Trample
When Child of Alara dies, destroy all nonland permanents. They can't be regenerated.

Exile all artifacts, creatures, and lands from the battlefield, all cards from all graveyards, and all cards from all hands.
Cycling
When you cycle Decree of Annihilation, destroy all lands.

Firespout deals 3 damage to each creature without flying if was spent to cast this spell and 3 damage to each creature with flying if was spent to cast this spell. (Do both if was spent.)

Destroy all artifacts and enchantments. You gain 2 life for each permanent destroyed this way.

Each player exiles all creature cards from their graveyard, then sacrifices all creatures they control, then puts all cards they exiled this way onto the battlefield.

Create X 1/1 white Soldier creature tokens. If X is 5 or more, destroy all other creatures.

Rolling Earthquake deals X damage to each creature without horsemanship and each player.

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

Put all creatures on the bottom of their owners' libraries.
Miracle

Return all permanents to their owners' hands.

Destroy all white creatures.

Destroy all creatures. They can't be regenerated.