Whenever you cast a spell, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

(: Add .)

Whenever you cast a Cat, Dog, or Hero spell, create a Food token. (It's an artifact with ", , Sacrifice this token: You gain 3 life.")
At the beginning of each end step, if you gained life this turn, put a +1/+1 counter on Lucky.

This land enters tapped.
: Add or .
: Until end of turn, this land becomes a 4/4 white and blue Elemental creature with flying and vigilance. It's still a land.

When Minsc & Boo enters and at the beginning of your upkeep, you may create Boo, a legendary 1/1 red Hamster creature token with trample and haste.
+1: Put three +1/+1 counters on up to one target creature with trample or haste.
−2: Sacrifice a creature. When you do, Minsc & Boo deals X damage to any target, where X is that creature's power. If the sacrificed creature was a Hamster, draw X cards.
Minsc & Boo, Timeless Heroes can be your commander.

Choose two —
• Target player loses X life.
• Return target creature card with mana value X or less from your graveyard to the battlefield.
• Target creature gets -X/-X until end of turn.
• Up to X target creatures gain fear until end of turn. (They can't be blocked except by artifact creatures and/or black creatures.)

At the beginning of your upkeep, put a time counter on this enchantment.
Once each turn, you may pay rather than pay the mana cost for a spell you cast with mana value X or less, where X is the number of time counters on this enchantment.

Haste
: Add one mana of any color. Spend this mana only to cast a creature spell.

Menace
Whenever one or more creatures you control deal combat damage to a player, create a Treasure token.
Sacrifice a Treasure: Exile the top card of your library. You may play that card this turn.

Trample
Whenever another nontoken creature you control enters, you may draw a card.

When this artifact enters, scry 1, then draw a card.
, , Sacrifice this artifact: You gain 3 life.
When this artifact is put into a graveyard from the battlefield, its owner shuffles it into their library.

Each player who has cast a nonartifact spell this turn can't cast additional nonartifact spells.

When Rishkar enters, put a +1/+1 counter on each of up to two target creatures.
Each creature you control with a counter on it has ": Add ."

Indestructible
Whenever this creature deals combat damage to a creature, flip a coin. If you win the flip, destroy that creature.

: Add one mana of any color in your commander's color identity.

As an additional cost to cast this spell, pay X life.
All creatures get -X/-X until end of turn.

: Add .
, Sacrifice this land: Add .

Flying
Sphinx spells you cast cost less to cast.
Whenever Unesh or another Sphinx you control enters, reveal the top four cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.

: Add .
: This land becomes a 1/1 Blinkmoth artifact creature with flying until end of turn. It's still a land.
, : Target Blinkmoth creature gets +1/+1 until end of turn.