Avatar: The Last Airbender (!TLA) 

Legendary Creature - Bison Ally 

3/4 

Flash, Flying // When Appa enters, airbend any number of other target nonland permanents you control. (Exile them. While each one is exiled, its owner may cast it for 2 rather than its mana cost.) // Whenever you cast a spell from exile, create a 1/1 white Ally creature token. 

Mael Ollivier-Henry