Pearl-Ear, Imperial Advisor, Cloudstone Curio, Faceless One, and Ugin's Mastery

Prerequisites

• Pearl-Ear, Imperial Advisor on the battlefield
• Cloudstone Curio on the battlefield
• Faceless One in hand
• Ugin's Mastery on the battlefield

Steps

1. Cast Faceless One by paying due to Pearl-Ear
2. When Faceless One enters the battlefield, Cloudstone Curio triggers, returning Ugin's Mastery from the battlefield to your hand
3. Cast Ugin's Mastery by paying due to Pearl-Ear
4. When Ugin's Mastery enters the battlefield, Cloudstone Curio triggers, returning Faceless One from the battlefield to your hand
5. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite storm count