Appa, Steadfast Guardian

CMC 4

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 rather than its mana cost.) Whenever you cast a spell from exile, create a 1/1 white Ally creature token.

P/T: 3/4