Cloudstone Curio + Crimson Kobolds + Rograkh, Son of Rohgahh

Cloudstone Curio

Crimson Kobolds

Rograkh, Son of Rohgahh

How it works

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