Cast Appa either from your hand or from the command zone by paying {W}{W} plus commander tax if applicable.
When Appa enters, it triggers, airbending Aang.
Cast Aang from exile by paying {0}.
Appa triggers, creating a 1/1 Ally creature token.
When Aang enters, it triggers, airbending Appa.
Cast Appa from exile by paying {0}.
Repeat from step 2.

Infinite LTB

Infinite ETB

Infinite storm count

Infinite creature tokens

Appa, Steadfast Guardian

Urza's Incubator

Aang, the Last Airbender

Cast Aang, Airbending Master either from your hand or from the command zone by paying {2}{W} plus commander tax if applicable.
When Aang, Airbending Master enters, it triggers, airbending Aang, the Last Airbender
Cast Aang, the Last Airbender from exile by paying {0}.
When Aang, the Last Airbender enters, it triggers, airbending Aang, Airbending Master.
Cast Aang, Airbending Master from exile by paying {0}.
Repeat from step 2.

Aang, Airbending Master

Cast Aang by paying its mana cost.
When Aang enters, it triggers, airbending Appa.
Cast Appa from exile by paying {0} due to Doc Aurlock.
When Appa enters, it triggers, airbending Aang.
Cast Aang from exile by paying {0} due to Doc Aurlock.
Appa's second ability triggers, creating a 1/1 Ally creature token.
Repeat from step 2.

Doc Aurlock, Grizzled Genius

Declare two creatures as attackers, ensuring to attack two different opponents. Commander Liara Portyr triggers, causing spells you cast from exile this turn to cost {2} less to cast.
Cast Aang by paying its mana cost.
When Aang enters, it triggers, exiling Restoration Angel with the ability to cast it from exile later.
Cast Restoration Angel from exile by paying {0} due to Commander Liara Portyr.
When Restoration Angel enters, it triggers, blinking Aang
Repeat from step 3.

Commander Liara Portyr

Restoration Angel

Cast Aang by paying its mana cost.
When Aang enters, it triggers, exiling Charismatic Conqueror.
Cast Charismatic Conqueror from exile by paying {2}.
Charismatic Conqueror's demonstrate ability triggers, causing you and an opponent to copy it.
Resolve the opponent's copy of Charismatic Conqueror, and then resolve your copy of Charismatic Conqueror.
When your Charismatic Conqueror token enters the battlefield,  the opponent's Charismatic Conqueror triggers, causing you to tap your Charismatic Conqueror token.
Resolve the original Charismatic Conqueror spell.
When the nontoken Charismatic Conqueror enters the battlefield, the opponent's Charismatic Conqueror triggers, causing you to not tap the nontoken Charismatic Conqueror, and causing the opponent to create a 1/1 Vampire creature token.
When the opponent's Vampire token enters the battlefield, both Charismatic Conquerors you control trigger, causing you to create at least one 1/1 Vampire creature token.
When your Vampire token enters the battlefield, the opponent's Charismatic Conqueror triggers, causing you to not tap the Vampire token, and causing the opponent to create a 1/1 Vampire creature token.
Repeat from step 9.

Combos with "Aang, the Last Airbender"