Alela, Artful Provocateur, Cloudstone Curio, Phyrexian Walker, and Shield Sphere

Prerequisites

• Alela, Artful Provocateur on the battlefield
• Cloudstone Curio on the battlefield
• Phyrexian Walker in hand
• Shield Sphere on the battlefield

Steps

1. Cast Phyrexian Walker by paying
2. Alela triggers, creating a 1/1 Faerie creature token
3. The Faerie enters the battlefield, triggering Cloudstone Curio, returning Shield Sphere from the battlefield to your hand
4. Cast Shield Sphere by paying
5. Alela triggers, creating a 1/1 Faerie creature token
6. The Faerie enters the battlefield, triggering Cloudstone Curio, returning Phyrexian Walker from the battlefield to your hand
7. Repeat

Results

• Infinite creature tokens
• Infinite ETB
• Infinite LTB
• Infinite storm count