Infernal Vessel, Luminous Broodmoth, and Yahenni, Undying Partisan

Prerequisites

• Infernal Vessel on the battlefield
• Luminous Broodmoth on the battlefield
• Yahenni, Undying Partisan on the battlefield

Steps

1. Activate Yahenni by sacrificing Infernal Vessel
2. When Infernal Vessel dies, it triggers, returning itself from your graveyard to the battlefield as a Demon in addition to its other types
3. Resolve the Yahenni ability
4. Activate Yahenni by sacrificing Infernal Vessel
5. When Infernal Vessel dies, Luminous Broodmoth triggers, returning Infernal Vessel from your graveyard to the battlefield with a flying counter on it
6. Resolve the Yahenni ability
7. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers