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

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

Destroy all white creatures.

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.)

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

Destroy all lands.

Destroy all creatures. They can't be regenerated.

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 of their choice for each soot counter on Smokestack.

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

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.

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

Return all permanents to their owners' hands.

Put all creatures on the bottom of their owners' libraries.
Miracle (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)

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

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