Appa, Steadfast Guardian + Restoration Angel + Helm of Awakening + Thornscape Familiar

Appa, Steadfast Guardian

Restoration Angel

Helm of Awakening

Thornscape Familiar

How it works

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