Infernal Vessel + Luminous Broodmoth + Phyrexian Altar

Infernal Vessel

Luminous Broodmoth

Phyrexian Altar

How it works

1. Activate Phyrexian Altar by sacrificing Infernal Vessel, adding one mana of any color.
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. Activate Phyrexian Altar by sacrificing Infernal Vessel, adding one mana of any color.
4. When Infernal Vessel dies, Luminous Broodmoth triggers, returning Infernal Vessel from your graveyard to the battlefield with a flying counter on it.
5. Repeat.