Infernal Vessel + Luminous Broodmoth + Altar of Dementia

Infernal Vessel

Luminous Broodmoth

Altar of Dementia

How it works

1. Activate Altar of Dementia 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 Altar of Dementia ability.
4. Activate Altar of Dementia 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 Altar of Dementia ability.
7. Repeat.