Card

Aang, the Last Airbender

Avatar: the Last Airbender Art Series

Avatar: The Last Airbender

Legendary Creature — Human Avatar Ally

Flying
When Aang enters, airbend up to one other target nonland permanent. (Exile it. While it's exiled, its owner may cast it for {2} rather than its mana cost.)
Whenever you cast a Lesson spell, Aang gains lifelink until end of turn.

Avatar: The Last Airbender Beginner Box Front Cards

Earthbending

Avatar: The Last Airbender Jumpstart Front Cards

Katara

Avatar: The Last Airbender Eternal

Katara, Waterbending Master

Experience

Legendary Creature — Human Warrior Ally

Whenever you cast a spell during an opponent's turn, you get an experience counter.
Whenever Katara attacks, you may draw a card for each experience counter you have. If you do, discard a card.

Enchantment

Whenever you attack with two or more legendary creatures, put a +1/+1 counter on each of up to two target attacking creatures.
At the beginning of your end step, if you control a creature with power 4 or greater, draw a card.

Master's Guidance

When Toph enters, earthbend 2. (Target land you control becomes a 0/0 creature with haste that's still a land. Put two +1/+1 counters on it. When it dies or is exiled, return it to the battlefield tapped.)
Toph's power is equal to the number of +1/+1 counters on lands you control.

Toph, the Blind Bandit

URL/Convention Promos

If a triggered ability of an Ally you control triggers, that ability triggers an additional time.