When Aang enters, airbend another target creature. (Exile it. While it's exiled, its owner may cast it for rather than its mana cost.)

Whenever one or more creatures you control leave the battlefield without dying, you get an experience counter.

At the beginning of your upkeep, create a 1/1 white Ally creature token for each experience counter you have.

When Rinoa Heartilly enters, create Angelo, a legendary 1/1 green and white Dog creature token.

Angelo Cannon — Whenever Rinoa Heartilly attacks, another target creature you control gets +1/+1 until end of turn for each creature you control.

Whenever another creature you control attacks, it gets +0/+1 until end of turn.

Flying

When this creature enters, return two creatures you control to their owner's hand.

Whenever this creature or another creature is returned to your hand from the battlefield, create a 1/1 white Soldier creature token.

When Abdel Adrian enters, exile any number of other nonland permanents you control until Abdel Adrian leaves the battlefield. Create a 1/1 white Soldier creature token for each permanent exiled this way.

Choose a Background (You can have a Background as a second commander.)

Flying

Whenever Gwaihir attacks, target attacking creature gains flying until end of turn.

At the beginning of each end step, if you gained 3 or more life this turn, create a 3/3 white Bird creature token with flying and "Whenever this token attacks, target attacking creature gains flying until end of turn."

Whenever another creature you control enters, this creature gets +1/+1 until end of turn.

, Exile a creature card from your graveyard: Create a 1/1 white Spirit creature token with flying.

First strike

Whenever this creature or another Human you control enters, tap target creature an opponent controls.

At the beginning of your upkeep, create a 1/1 white Human Soldier creature token.

Flash

This spell costs less to cast for each creature attacking you.

When this creature enters, you get for each creature attacking you.

At the beginning of combat on your turn, you may pay . If you do, put a +1/+1 counter on each creature you control.

At the beginning of your upkeep, put a +1/+1 counter on each other creature you control.

When Niko enters, create two Shard tokens. (They're enchantments with ", Sacrifice this token: Scry 1, then draw a card.")

, : Exile target nonlegendary creature you control. Shards you control become copies of it until the next end step. Return it to the battlefield under its owner's control at the beginning of the next end step.

Vigilance

When this creature enters, exile any number of other nontoken creatures you control until it leaves the battlefield.

This creature gets +2/+2 for each card exiled with it.

When Ratatwotwo enters the battlefield, create a Chef Role token attached to up to one other target creature you control. (Enchanted creature gets +1/+1 and has "Whenever this creature attacks, create a Food token.")

Whenever a creature you control enchanted by a Chef Role attacks or blocks, it gets +X/+X until end of turn, where X is Ratatwotwo's power.

Deathtouch, haste

When this creature enters, exile up to one other target creature you control until this creature leaves the battlefield.

Whenever this creature attacks, for each opponent, create a tapped token that's a copy of the exiled card attacking that opponent. At the beginning of your next end step, sacrifice those tokens.

Flying

At the beginning of your upkeep, return a white creature you control to its owner's hand.

Creatures you control get +X/+X, where X is the number of creatures that entered the battlefield under your control this turn.

At the beginning of combat on your turn, create a 1/1 green and white Kithkin creature token.

When this creature enters, create a 1/1 white Kor Warrior creature token for each creature in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)

At the beginning of combat on your turn, if you have a full party, creatures you control get +1/+0 and gain indestructible until end of turn.

At the beginning of combat on your turn, target creature you control gets +X/+0 until end of turn, where X is the number of Soldiers you control.

At the beginning of your end step, create a number of 1/1 white Soldier creature tokens equal to the number of opponents who control more creatures than you.