Thorin, Mountain-king, Raphael, Ninja Destroyer, Nim Deathmantle, and Yahenni, Undying Partisan

Prerequisites

• Thorin, Mountain-king on the battlefield
• Raphael, Ninja Destroyer on the battlefield
• Nim Deathmantle on the battlefield
• Yahenni, Undying Partisan on the battlefield
• available

Steps

1. Activate Yahenni by sacrificing Thorin
2. When Thorin dies, Nim Deathmantle triggers, causing you to pay to return Thorin from your graveyard to the battlefield and attach Nim Deathmantle to it
3. When Thorin enters, it triggers, attaching Nim Deathmantle to Raphael, and then having Raphael deal 6 damage to itself
4. Raphael triggers, adding six
5. Resolve the Yahenni ability
6. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite red mana
• Infinite sacrifice triggers