Primal Prayers, Aetherstorm Roc, and Stonecloaker

Prerequisites

• Primal Prayers on the battlefield
• Aetherstorm Roc on the battlefield
• Stonecloaker in hand
• You have at least or enough mana to cast Stonecloaker

Steps

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

Results

• Infinite LTB
• Infinite ETB
• Infinite storm count
• Exile all cards from all graveyards