Appa, Steadfast Guardian + Wispweaver Angel + The Immortal Sun + Stormscape Familiar

Appa, Steadfast Guardian

Wispweaver Angel

The Immortal Sun

Stormscape Familiar

How it works

1. Cast Appa by paying
2. When Appa enters, its first ability triggers, exiling Wispweaver Angel with the ability to cast it later from exile.
3. Cast Wispweaver Angel from exile by paying 0.
4. Appa's second ability triggers, creating a 1/1 Ally creature token
5. When Wispweaver Angel enters, it triggers, blinking Appa.
6. Repeat from step 2.