Hamza, Guardian of Arashin + Ashaya, Soul of the Wild + Retreat to Emeria + Beastcaller Savant + Cloudstone Curio

How it works

1. Cast Beastcaller Savant for , triggering Retreat to Emeria and Cloudstone Curio.
2. Resolve Cloudstone Curio's trigger choosing not to return another permanent.
3. Resolve Retreat to Emeria's trigger, creating a 1/1 Kor Ally creature token.
4. The Kor Ally token triggers Cloudstone Curio.
5. Tap Beastcaller Savant, adding .
6. Resolve Cloudstone Curio's trigger returning Beastcaller Savant to your hand.
7. Repeat.