Zinnia, Valley's Voice + Appa, Steadfast Guardian + Burning-Tree Emissary + Kaya, Geist Hunter

Zinnia, Valley's Voice

Appa, Steadfast Guardian

Burning-Tree Emissary

Kaya, Geist Hunter

How it works

1. Cast Burning-Tree Emissary by paying its mana cost plus an additional 2 for its offspring cost.
2. When Burning-Tree Emissary enters, its innate ability and its offspring ability trigger.
3. Resolve the innate Burning-Tree Emissary trigger, adding
4. Resolve the offspring trigger, creating two token copies of Burning-Tree Emissary that are 1/1.
5. When the Burning-Tree Emissary tokens enter, they each trigger, adding six .
6. Cast Appa by paying its mana cost plus an additional 2 for its offspring cost.
7. When Appa enters, its innate ability and its offspring ability trigger.
8. Resolve the innate Appa trigger, airbending the nontoken Burning-Tree Emissary.
9. Resolve the offspring trigger, creating two token copies of Appa that are 1/1.
10. Put both Appa tokens into your graveyard due to the legend rule.
11. Both Appa tokens' enter-the-battlefield ability trigger, airbending Appa with one trigger and nothing with the other.
12. Cast Burning-Tree Emissary from exile by paying 2 plus an additional 2 for its offspring cost.
13. Repeat steps 2 through 5 once.
14. Cast Appa from exile by paying 2 plus an additional 2 for its offspring cost.
15. Repeat from step 7.