Priest of Urabrask + Priest of Gix + Cloudstone Curio + Urza's Incubator

Priest of Urabrask

Priest of Gix

Cloudstone Curio

Urza's Incubator

How it works

1. Cast Priest of Gix by paying .
2. Priest of Gix enters the battlefield, triggering itself and Cloudstone Curio.
3. Resolve the Priest of Gix trigger, adding .
4. Resolve the Cloudstone Curio trigger, returning Priest of Urabrask from the battlefield to your hand.
5. Cast Priest of Urabrask by paying .
6. Priest of Urabrask enters the battlefield, triggering itself and Cloudstone Curio.
7. Resolve the Priest of Urabrask trigger, adding .
8. Resolve the Cloudstone Curio trigger, returning Priest of Gix from the battlefield to your hand.
9. Repeat.