Whenever another nontoken Ooze creature you control dies, create two tokens that are copies of that creature, except they're 2/2 and they aren't legendary.

Whenever another Zombie you control enters, put a +1/+1 counter on target Cat you control.
Whenever another Cat you control enters, put a +1/+1 counter on target Zombie you control.
At the beginning of your end step, each opponent loses life equal to the number of tapped Cats and/or Zombies you control.

Landfall — Whenever a land you control enters, any number of target players each mill X cards, where X is twice the number of Crabs, Lobsters, Nautiluses, Starfish, and/or Trilobites you control.

Players can't gain life.
Celebration — At the beginning of your end step, create a Food token. If two or more nonland permanents entered the battlefield under your control this turn, instead conjure a card named Food Fight onto the battlefield.

: Reveal a card in your hand, covering the artist credit. Target opponent guesses the artist. If they guess wrong, create a 1/1 green Squirrel creature token.

When Aswan Jaguar comes into play, choose a random creature type from those in target opponent's deck.
, : Bury target creature of the chosen type.

Haste
Whenever you cast your second spell each turn, untap target creature, then investigate. (Create a colorless Clue artifact token with ", Sacrifice this artifact: Draw a card.")
Partner—Friends forever (You can have two commanders if both have this ability.)

When you have 30 or more life, flip Rune-Tail.

As this creature enters, choose a word.
Each card in your hand with the chosen word in its name, type line, and/or rules text has cycling . (, Discard that card: Draw a card.)
Whenever you cycle a card, put a +1/+1 counter on this creature.

Reach
Commanders you control get +X/+0, where X is the number of commanders you control.

Eminence — , Discard a card: Target player reveals cards from the top of their library until they reveal a creature card with converted mana cost X or less. Put that card onto the battlefield under your control, then that player shuffles the rest into their library. Activate this ability only if M'Odo, the Gnarled Oracle is on the battlefield or in the command zone.

Flying, haste
Whenever Mountain Mover enters or attacks, put a Mountain card from outside the game underneath it.
When Mountain Mover leaves the battlefield, put all cards underneath it onto the battlefield.
Crew 3

Vigilance

Vigilance, menace, lifelink
Precious (You can have two commanders if the other one is a legendary noncreature artifact.)
As long as you control your Precious, Ormacar gets +X/+X, where X is the mana value of your Precious.

Rare and mythic rare spells you cast cost less to cast.
, , Reveal a My Little Pony® toy you own: Until end of turn, another target creature gains protection from each color in that toy's coat, mane, and outfit.

Destroy target silver-bordered or acorn permanent in any game you can see from your seat.

First strike, reach
Whenever Lara Croft attacks, exile up to one target legendary artifact card or legendary land card from a graveyard and put a discovery counter on it. You may play a card from exile with a discovery counter on it this turn.
Raid — At end of combat on your turn, if you attacked this turn, create a Treasure token.

, : Choose target creature card in your graveyard that was put there from the battlefield this turn. Return it to the battlefield tapped.
Partner—Friends forever (You can have two commanders if both have this ability.)

First strike
You may spend mana as though it were mana of any color to cast spells you don't own or to activate abilities of permanents you control but don't own.
Whenever Nathan Drake attacks, exile the top card of each player's library. You may cast a spell from among those cards.

When you cast this spell, create a number of 1/1 black Fungus Zombie creature tokens named Cordyceps Infected equal to the amount of mana spent to cast it.
Abby enters under the control of an opponent of your choice.
Partner—Survivors (You can have two commanders if both have this ability.)

Reach
, : Draw a card for each experience counter you have, then discard a card. Atreus deals 2 damage to each opponent.
Partner—Father & son (You can have two commanders if both have this ability.)

Ward—Pay 3 life.
Whenever The Meep attacks, you may sacrifice another creature. If you do, creatures you control have base power and toughness X/X until end of turn, where X is the sacrificed creature's mana value.

Whenever The Celestial Toymaker attacks, look at the top three cards of your library. Exile any number of them in a face-down pile and the rest in a face-up pile. Defending player chooses one of those piles. Put that pile into your hand.
At the beginning of each end step, each opponent loses 2 life for each spell or ability that caused one or more players to guess or to group cards or permanents into a pile this turn.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
: Aisha of Sparks and Smoke gains first strike until end of turn.
Whenever Aisha deals combat damage, you may cast a sorcery spell from your hand with mana value less than or equal to that damage without paying its mana cost.

Flying, haste
Whenever a creature you control with flying and/or haste attacks, you get 20% cooler. (You start at 0% coolness.)
Sonic Rainboom — : If you're at least 100% cool, add , draw a card, and reset your coolness.

Skulk (This creature can't be blocked by creatures with greater power.)
Whenever Gregor, Shrewd Magistrate deals combat damage to a player, draw cards equal to its power.

Flash
Flying
Whenever a Vehicle you control enters, draw a card if it has flying. Otherwise, put a flying counter on it.

When you cast this spell, reveal the top fourteen cards of your library. Put all Doctor cards revealed this way into your graveyard and the rest on the bottom of your library in a random order.
You may have The Fourteenth Doctor enter as a copy of a Doctor card in your graveyard that was put there from your library this turn. If you do, it gains haste until end of turn.

Whenever you cast an instant or sorcery spell with mana value 3 or greater, roll a d20.
1-9 | Each player draws a card.
10-19 | You draw a card.
20 | Copy that spell. You may choose new targets for the copy.

Defender, flying
, : Put a +1/+1 counter on each creature with a tail target player controls. Stare down up to one target creature until end of turn. (It can't attack or block as long as you're looking directly at it.)

Multikicker
When Zethi, Arcane Blademaster enters, exile up to X target instant cards from your graveyard, where X is the number of times Zethi was kicked. Put a kick counter on each of them.
Whenever Zethi attacks, copy each exiled card you own with a kick counter on it. You may cast the copies.

Each nonland card in your hand without foretell has foretell. Its foretell cost is equal to its mana cost reduced by . (During your turn, you may pay and exile it from your hand face down. Cast it on a later turn for its foretell cost.)
Whenever you cast your second spell each turn, goad target creature an opponent controls.

Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.)
, , Discard a card: Vikya, Scorching Stalwart deals damage equal to its power to any target. If excess damage was dealt to a creature this way, draw a card. ( is the untap symbol.)

Pay 2 life, Sacrifice another creature: Ellie deals 2 damage to target player and gains indestructible until end of turn.
Partner—Survivors (You can have two commanders if both have this ability.)

First strike
Whenever The Ghoul or another nontoken Zombie or Mutant you control dies, target player gets two rad counters. If that player is you, create a Treasure token.

Double strike
All creatures have haste.
At the beginning of each player's end step, Kratos deals damage to that player equal to the number of creatures that player controls that didn't attack this turn.