Appa, Steadfast Guardian + Heliod, the Radiant Dawn // Heliod, the Warped Eclipse + Aang, Airbending Master

Appa, Steadfast Guardian

Heliod, the Radiant Dawn // Heliod, the Warped Eclipse

Aang, Airbending Master

How it works

1. Cast Appa by paying .
2. When Appa enters, it triggers, airbending Aang.
3. Cast Aang from exile by paying 0.
4. Appa triggers, creating a 1/1 Ally creature token.
5. When Aang enters, it triggers, airbending Appa.
6. Cast Appa from exile by paying 0.
7. Repeat from step 2.