Alela, Artful Provocateur, Cloudstone Curio, Shield Sphere, and Ornithopter

Prerequisites

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

Steps

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

Results

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