Infernal Vessel + Luminous Broodmoth + Yahenni, Undying Partisan

Infernal Vessel

Luminous Broodmoth

Yahenni, Undying Partisan

How it works

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.