Samwise the Stouthearted, Nim Deathmantle, Ashnod's Altar, and Ornithopter

Prerequisites

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

Steps

1. Activate Ashnod's Altar by sacrificing Ornithopter, adding
2. When Ornithopter 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 Ornithopter from your graveyard to your hand, and causing the Ring to tempt you
6. Cast Ornithopter by paying
7. Repeat

Results

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