Mikaeus, the Unhallowed + Otherworldly Escort + Goblin Bombardment

Mikaeus, the Unhallowed

Otherworldly Escort

Goblin Bombardment

How it works

1. Activate Goblin Bombardment by sacrificing Otherworldly Escort.
2. When Otherworldly Escort dies, it triggers, returning itself from your graveyard to the battlefield as a Spirit Detective.
3. Resolve the Goblin Bombardment ability.
4. Activate Goblin Bombardment by sacrificing Otherworldly Escort.
5. When Otherworldly Escort dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
6. Resolve the Goblin Bombardment ability.
7. Repeat.