Mikaeus, the Unhallowed + Lesser Masticore + Bartolomé del Presidio

Mikaeus, the Unhallowed

Lesser Masticore

Bartolomé del Presidio

How it works

1. Activate Bartolomé del Presidio 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 Bartolomé del Presidio ability.
4. Activate Bartolomé del Presidio 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 Bartolomé del Presidio ability.
7. Repeat.