Appa, Steadfast Guardian{2}{W}{W}

Legendary Creature — Bison Ally

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.

3/4

Illustrated by Maël Ollivier-Henry