Primal Prayers + Decoction Module + Stonecloaker

Primal Prayers

Decoction Module

Stonecloaker

How it works

1. Cast Stonecloaker by paying E due to Primal Prayers, if able, or by paying its mana cost.
2. When Stonecloaker enters the battlefield, it and Decoction Module trigger.
3. Resolve the Decoction Module trigger, causing you to get E.
4. Resolve the Stonecloaker trigger, returning it from the battlefield to your hand.
5. Repeat.