Mikaeus, the Unhallowed + Thermopod + Lesser Masticore

Mikaeus, the Unhallowed

Thermopod

Lesser Masticore

How it works

1. Activate Thermopod 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. Activate Thermopod by sacrificing Lesser Masticore.
4. When Lesser Masticore dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
5. Repeat.