Morophon, the Boundless + Cloudstone Curio + Beastcaller Savant + Crookshank Kobolds

Morophon, the Boundless

Cloudstone Curio

Beastcaller Savant

Crookshank Kobolds

How it works

1. Activate Beastcaller Savant by tapping it, adding that can only be spent to cast a creature spell.
2. Cast Crookshank Kobolds by paying 0.
3. When Crookshank Kobolds enters the battlefield, Cloudstone Curio triggers, returning Beastcaller Savant to your hand from the battlefield.
4. Cast Beastcaller Savant by paying 1 due to Morophon.
5. When Beastcaller Savant enters the battlefield, Cloudstone Curio triggers, returning Crookshank Kobolds to your hand from the battlefield.
6. Repeat.