Blessed Sanctuary + Cloudstone Curio + Crookshank Kobolds

Blessed Sanctuary

Cloudstone Curio

Crookshank Kobolds

How it works

1. Cast Crookshank Kobolds by paying 0.
2. Crookshank Kobolds enters the battlefield, triggering Cloudstone Curio and Blessed Sanctuary.
3. Resolve the Cloudstone Curio trigger, returning nothing from the battlefield to your hand.
4. Resolve the Blessed Sanctuary, creating a 2/2 Unicron creature token.
5. The Unicorn enters the battlefield, triggering Cloudstone Curio, returning Crookshank Kobolds from the battlefield to your hand.
6. Repeat.