Acidic Soil deals damage to each player equal to the number of lands they control.

Each player sacrifices all permanents they control that are one or more colors.

Join forces -- Starting with you, each player may pay any amount of mana. Each player creates X 1/1 white Soldier creature tokens, where X is the total amount of mana paid this way.

At the beginning of each player's upkeep, Ancient Runes deals damage to that player equal to the number of artifacts they control.

All creatures have vigilance.

At the beginning of each player's end step, tap all untapped creatures that player controls that didn't attack this turn. Angel's Trumpet deals damage to the player equal to the number of creatures tapped this way.

At the beginning of each player's end step, Antagonism deals 2 damage to that player unless one of their opponents was dealt damage this turn.

Players have no maximum hand size.

At the beginning of each player's draw step, that player draws an additional card, then discards a card.

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

Flying

As Archangel of Strife enters the battlefield, each player chooses war or peace.

Creatures controlled by players who chose war get +3/+0.

Creatures controlled by players who chose peace get +0/+3.

At the beginning of your upkeep, put a doom counter on Armageddon Clock.

At the beginning of your draw step, Armageddon Clock deals damage equal to the number of doom counters on it to each player.

{4}: Remove a doom counter from Armageddon Clock. Any player may activate this ability but only during any upkeep step.

Each player discards all the cards in their hand, then creates that many 2/2 black Zombie creature tokens.

Each player chooses a number of lands they control equal to the number of lands controlled by the player who controls the fewest, then sacrifices the rest. Players discard cards and sacrifice creatures the same way.

Each player chooses a number of permanents they control equal to the number of permanents controlled by the player who controls the fewest, then sacrifices the rest. Each player discards cards the same way.

At the beginning of each player's upkeep, Barbed Wire deals 1 damage to that player.

{2}: Prevent the next 1 damage that would be dealt by Barbed Wire this turn.

Each player sacrifices two creatures.

Each player separates all nontoken lands they control into two piles. For each player, one of their piles is chosen by one of their opponents of their choice. Destroy all lands in the chosen piles. Tap all lands in the other piles.

Each player's life total becomes the number of creatures they control.

At the beginning of each player's precombat main phase, if Blinkmoth Urn is untapped, that player adds {C} for each artifact they control.

At the beginning of each player's upkeep, that player returns a permanent they control to its owner's hand unless they pay 2 life.

Whenever a player casts a creature spell, each player returns all cards with the same name as that spell from their graveyard to the battlefield.

When Borderland Explorer enters the battlefield, each player may discard a card. Each player who discarded a card this way may search their library for a basic land card, reveal it, put it into their hand, then shuffle.

At the beginning of each player's upkeep, that player discards a card at random.

At the beginning of each player's upkeep, that player sacrifices an artifact, creature, or land.

At the beginning of each player's upkeep, that player may put an artifact, creature, or land card from their hand onto the battlefield.

Each player draws three cards, then discards three cards at random.

At the beginning of each player's upkeep, that player sacrifices a non-Zombie creature.

At the beginning of the end step, if no creatures are on the battlefield, sacrifice Call to the Grave.

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

When Centaur Peacemaker enters the battlefield, each player gains 4 life.

At the beginning of each upkeep, count the number of permanents. If the number is odd, until end of turn, red creatures get +1/+1 and whenever a player taps a Mountain for mana, that player adds an additional {R}. If the number is even, until end of turn, red creatures get -1/-1 and if a player taps a Mountain for mana, that Mountain produces colorless mana instead of any other type.

At the beginning of each player's end step, Citadel of Pain deals X damage to that player, where X is the number of untapped lands they control.

Each player reveals the top five cards of their library, puts all land cards revealed this way onto the battlefield tapped, and exiles the rest.

Flash

Reach

When Cloudthresher enters the battlefield, it deals 2 damage to each creature with flying and each player.

Evoke {2}{G}{G} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)

Domain -- At the beginning of each player's upkeep, that player gains 1 life for each basic land type among lands they control. Then Collapsing Borders deals 3 damage to that player.

At the beginning of each player's upkeep, Copper Tablet deals 1 damage to that player.

Each player sacrifices a permanent.

Double strike

When Crypt Champion enters the battlefield, each player puts a creature card with mana value 3 or less from their graveyard onto the battlefield.

When Crypt Champion enters the battlefield, sacrifice it unless {R} was spent to cast it.

Each player returns a creature they control to its owner's hand.

Dakmor Plague deals 3 damage to each creature and each player.

A player who controls more permanents than each other player can't play lands or cast artifact, creature, or enchantment spells. That player may sacrifice a permanent for that player to ignore this effect until end of turn.

Each player discards all the cards in their hand, then draws that many cards minus one.

Each player shuffles their hand and graveyard into their library, then draws seven cards. If it's your turn, end the turn. (Exile all spells and abilities from the stack, including this card. Discard down to your maximum hand size. Damage wears off, and "this turn" and "until end of turn" effects end.)

Destroy all creatures. Each player loses life equal to the number of creatures they controlled that were destroyed this way.

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

Flying

At the beginning of each player's upkeep, that player sacrifices a monocolored creature.

Each player discards three cards.

At the beginning of each player's upkeep, that player sacrifices a nonbasic land.

Each player sacrifices five lands. Destructive Force deals 5 damage to each creature.

Flash

At the beginning of each player's draw step, that player draws an additional card.

Exile all permanents. For as long as any of those cards remain exiled, at the beginning of each player's upkeep, that player returns one of the exiled cards they own to the battlefield.

Menace, deathtouch

When Dire Fleet Ravager enters the battlefield, each player loses a third of their life, rounded up.

At the beginning of each player's draw step, that player draws two additional cards.

At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.