Priest of Urabrask, Priest of Gix, Cloudstone Curio, and Urza's Incubator

Prerequisites

• Priest of Urabrask on the battlefield
• Priest of Gix in hand
• Cloudstone Curio on the battlefield
• Urza's Incubator on the battlefield
• "Human" or "Cleric" chosen with Urza's Incubator
• available

Steps

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

Results

• Infinite black mana
• Infinite ETB
• Infinite LTB
• Infinite red mana
• Infinite storm count