Whenever you cast a Dog spell, create a 1/1 green Cat creature token.
Whenever you cast a Cat spell, create a 1/1 white Dog creature token.
, : Rin and Seri deals damage to any target equal to the number of Dogs you control. You gain life equal to the number of Cats you control.

Red spells you cast cost less to cast.

: You may put a green creature card from your hand onto the battlefield. Activate only during your turn, before attackers are declared.

At the beginning of your end step, exile target creature you control, then return it to the battlefield under its owner's control. Then if it's the first end step of the turn, there is an additional end step after this step.

: Choose target non-Wall creature the active player has controlled continuously since the beginning of the turn. That creature attacks this turn if able. Destroy it at the beginning of the next end step if it didn't attack this turn. Activate only during an opponent's turn, before attackers are declared.

Ward
As this creature enters, choose a creature type.
This creature is the chosen type in addition to its other types.
If a triggered ability of another creature you control of the chosen type triggers, it triggers an additional time.

At the beginning of each player's upkeep, this enchantment deals damage to that player equal to the number of Swamps they control.

Double strike
Whenever you cast a creature spell, create a 4/4 black Zombie Warrior creature token with vigilance.
When God-Eternal Oketra dies or is put into exile from the battlefield, you may put it into its owner's library third from the top.

: Put a +1/+1 counter on each artifact creature you control.

Equipped creature has ", : This creature deals 1 damage to any target" and "Whenever a creature dies, untap this creature."
Whenever a Shaman creature enters, you may attach this Equipment to it.
Equip

Flying
, Sacrifice this creature: Counter target noncreature spell.
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

Flying, vigilance, indestructible
Other permanents you control have indestructible.

, Pay 1 life, Sacrifice this land: Search your library for a Mountain or Forest card, put it onto the battlefield, then shuffle.

As this land enters, choose a creature type.
: Add .
: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type, and that spell can't be countered.

At the beginning of your upkeep, you draw X cards and you lose X life, where X is the number of Zombies you control.

Ew-minance — When The Gunky Runner enters and at the beginning of the first upkeep in a game where it's your commander, shuffle three Gunk cards into each opponent's library. (Gunk is a colorless sorcery card with no mana cost and cycling .)
Whenever an opponent loses life, they shuffle that many Gunk cards into their library.
Ready to run (You can have two commanders if both have ready to run.)

Return target nonland permanent you don't control to its owner's hand.
Overload (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Pay 1 life, Sacrifice another creature: Create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")

Whenever a creature you control enters, you may look at the top X cards of your library, where X is that creature's power. If you do, put one of those cards on top of your library and the rest on the bottom of your library in any order.

, : Look at the top four cards of your library. You may reveal an artifact card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.
: Transform Tony Stark. Activate only as a sorcery.