Mikaeus, the Unhallowed + Viscera Seer + Lesser Masticore

Mikaeus, the Unhallowed

Viscera Seer

Lesser Masticore

How it works

1. Activate Viscera Seer by sacrificing Lesser Masticore.
2. When Lesser Masticore dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Resolve the Viscera Seer ability.
4. Activate Viscera Seer by sacrificing Lesser Masticore.
5. When Lesser Masticore dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
6. Resolve the Viscera Seer ability.
7. Repeat.