Creatures can't attack a player unless that player cast a spell or put a nontoken permanent onto the battlefield during their last turn.

No more than two creatures can attack each combat.

No more than two creatures can block each combat.

All creatures have haste.

When Eye of Singularity enters, destroy each permanent with the same name as another permanent, except for basic lands. They can't be regenerated.

Whenever a permanent other than a basic land enters, destroy all other permanents with that name. They can't be regenerated.

Players can't gain life.

At the beginning of each player's upkeep, that player loses 1 life.

Whenever Forsaken Wastes becomes the target of a spell, that spell's controller loses 5 life.

At the beginning of each player's upkeep, that player chooses a color. Until end of turn, lands tapped for mana produce mana of the chosen color instead of any other color.

At the beginning of your upkeep, sacrifice Koskun Falls unless you tap an untapped creature you control.

Creatures can't attack you unless their controller pays for each creature they control that's attacking you.

All lands are 1/1 creatures that are still lands.

All creatures lose flying and islandwalk.

As Null Chamber enters, you and an opponent each choose a card name other than a basic land card name.

Spells with the chosen names can't be cast and lands with the chosen names can't be played.

When CARDNAME enters the battlefield, it deals 4 damage to any target. Then, starting with you, each player assigns their creatures to the left or right of the volcano. Creatures enter the battlefield to the left or right of the volcano.

Creatures can't block creatures on the other side of the volcano.

Creatures with flying get +1/+1.

At the beginning of each player's upkeep, that player chooses artifact, creature, land, or non-Aura enchantment. All nontoken permanents of that type phase out. (While they're phased out, they're treated as though they don't exist. Each one phases in before its controller untaps during their next untap step.)

Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

At the beginning of each upkeep, if Tombstone Stairwell is on the battlefield, each player creates a 2/2 black Zombie creature token with haste named Tombspawn for each creature card in their graveyard.

At the beginning of each end step and when Tombstone Stairwell leaves the battlefield, destroy all tokens created with Tombstone Stairwell. They can't be regenerated.