Samwise the Stouthearted, Nim Deathmantle, Ashnod's Altar, and Shield Sphere

Prerequisites

• Samwise the Stouthearted on the battlefield
• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• Shield Sphere on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Shield Sphere, adding
2. When Shield Sphere dies, Nim Deathmantle triggers, choose not to pay for the trigger
3. Activate Ashnod's Altar by sacrificing Samwise the Stouthearted, adding
4. When Samwise the Stouthearted dies, Nim Deathmantle triggers, causing you to pay to return Samwise the Stouthearted from your graveyard to the battlefield, and attach Nim Deathmantle to it
5. When Samwise the Stouthearted enters the battlefield, it triggers, returning Shield Sphere from your graveyard to your hand, and causing the Ring to tempt you
6. Cast Shield Sphere by paying
7. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count