Desolation Angel

Kicker {W}{W} (You may pay an additional {W}{W} as you cast this spell.)
Flying
When Desolation Angel enters, destroy all lands you control. If it was kicked, destroy all lands instead.

Devastation

Armageddon

Bust

Boom

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

Boom // Bust

Soulscour

Strategy, Schmategy

Roll a six-sided die. Strategy, Schmategy has the indicated effect.
1 — Do nothing.
2 — Destroy all artifacts.
3 — Destroy all lands.
4 — Strategy, Schmategy deals 3 damage to each creature and each player.
5 — Each player discards their hand and draws seven cards.
6 — Repeat this process two more times.

Jokulhaups

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

Myojin of Infinite Rage

Myojin of Infinite Rage enters with a divinity counter on it if you cast it from your hand.
Myojin of Infinite Rage has indestructible as long as it has a divinity counter on it.
Remove a divinity counter from Myojin of Infinite Rage: Destroy all lands.

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.

Ravages of War

Obliterate

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

Ruination

Darksteel Citadel

Catastrophe

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

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.