Cleansing Nova

Choose one —
• Destroy all creatures.
• Destroy all artifacts and enchantments.

Arcane Laboratory

Each player can't cast more than one spell each turn.

Nether Void

Whenever a player casts a spell, counter it unless that player pays {3}.

Stony Silence

Activated abilities of artifacts can't be activated.

Pendrell Mists

All creatures have "At the beginning of your upkeep, sacrifice this creature unless you pay {1}."

Damnation

Destroy all creatures. They can't be regenerated.

Vanquish the Horde

This spell costs {1} less to cast for each creature on the battlefield.
Destroy all creatures.

Purify

Wrath of God

Mana Maze

Players can't cast spells that share a color with the spell most recently cast this turn.

Mana Breach

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

Serenity

At the beginning of your upkeep, destroy all artifacts and enchantments. They can't be regenerated.

Embargo

Nonland permanents don't untap during their controllers' untap steps.
At the beginning of your upkeep, you lose 2 life.

Tainted Aether

Whenever a creature enters, its controller sacrifices a creature or land of their choice.

Sen Triplets

At the beginning of your upkeep, choose target opponent. This turn, that player can't cast spells or activate abilities and plays with their hand revealed. You may play lands and cast spells from that player's hand this turn.

Overburden

Whenever a player puts a nontoken creature onto the battlefield, that player returns a land they control to its owner's hand.