Mikaeus, the Unhallowed + Luminous Broodmoth + Viscera Seer

Mikaeus, the Unhallowed

Luminous Broodmoth

Viscera Seer

How it works

1. Activate Viscera Seer by sacrificing it.
2. When Viscera Seer dies, its undying ability triggers if it didn't have a +1/+1 counter, and Luminous Broodmoth triggers if Viscera Seer didn't have flying.
3. Resolve the undying trigger, if applicable, returning Viscera Seer from your graveyard to the battlefield with a +1/+1 counter on it.
4. Resolve the Luminous Broodmoth trigger, if applicable, returning Viscera Seer from your graveyard to the battlefield with a flying counter on it if Viscera Seer is still in your graveyard.
5. Resolve the Viscera Seer ability.
6. Repeat.