Appa, Steadfast Guardian + Nylea, Keen-Eyed + Restoration Angel + The Wind Crystal

Appa, Steadfast Guardian

Nylea, Keen-Eyed

Restoration Angel

The Wind Crystal

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.