Appa, Steadfast Guardian (Borderless) [TLA-0316]

Flash

Flying

When Appa enters, airbend any number d any 1 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.