Aang, the Last Airbender — ruling 1

If the spell you cast has {X} in its mana cost, you must choose 0 as the value of X.

Aang, the Last Airbender — ruling 2

Since you are using an alternative cost to cast a spell from exile this way, you can't pay any other alternative costs. You can, however, pay additional costs, such as kicker costs. If the card has any mandatory additional costs, you must pay those.

Aang, the Last Airbender — ruling 3

Tokens exiled this way will cease to exist and cannot be cast.

Aang, the Last Airbender — ruling 4

Lands exiled this way cannot be played from exile. (Lands that were animated by earthbend will be returned to the battlefield tapped when they're exiled.)

Aang, the Last Airbender — ruling 5

To airbend one or more permanents and/or spells means to exile each of those objects. For each card exiled this way, for as long as it's exiled, its owner may cast it from exile by paying {2} rather than paying its mana cost.

Aang, the Last Airbender : règles, fonctionnement et interactions (MTG)

Aang, the Last Airbender is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Flying When Aang enters, airbend up to one other target nonland permanent. (Exile it. While it's exiled, its owner may cast it for rather than its mana cost.) Whenever you cast a Lesson spell, Aang gains lifelink until end of turn.

How it works : Aang, the Last Airbender

Original English text — Wizards of the Coast / Scryfall

#1October 2, 2025· Wizards of the Coast
If the spell you cast has in its mana cost, you must choose 0 as the value of X.
No other card is named in this ruling.
#2October 2, 2025· Wizards of the Coast
Since you are using an alternative cost to cast a spell from exile this way, you can't pay any other alternative costs. You can, however, pay additional costs, such as kicker costs. If the card has any mandatory additional costs, you must pay those.
No other card is named in this ruling.
#3October 2, 2025· Wizards of the Coast
Tokens exiled this way will cease to exist and cannot be cast.
No other card is named in this ruling.
#4October 2, 2025· Wizards of the Coast
Lands exiled this way cannot be played from exile. (Lands that were animated by earthbend will be returned to the battlefield tapped when they're exiled.)
No other card is named in this ruling.
#5October 2, 2025· Wizards of the Coast
To airbend one or more permanents and/or spells means to exile each of those objects. For each card exiled this way, for as long as it's exiled, its owner may cast it from exile by paying rather than paying its mana cost.
No other card is named in this ruling.