Mikaeus, the Unhallowed + Putrid Goblin + Bartolomé del Presidio

Mikaeus, the Unhallowed

Putrid Goblin

Bartolomé del Presidio

How it works

1. Activate Bartolomé del Presidio by sacrificing Putrid Goblin.
2. When Putrid Goblin 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 Putrid Goblin.
5. When Putrid Goblin 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.