Cloudstone Curio + Crookshank Kobolds + Kobolds of Kher Keep

Cloudstone Curio

Crookshank Kobolds

Kobolds of Kher Keep

How it works

1. Cast Kobolds of Kher Keep by paying 0.
2. When Kobolds of Kher Keep enters. Cloudstone Curio triggers, returning Crookshank Kobolds from the battlefield to your hand.
3. Cast Crookshank Kobolds by paying 0.
4. When Crookshank Kobolds enters, Cloudstone Curio triggers, returning Kobolds of Kher Keep from the battlefield to your hand.
5. Repeat.