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

Appa, Steadfast Guardian

Nylea, Keen-Eyed

Felidar Guardian

The Wind Crystal

How it works

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