Mikaeus, the Unhallowed + Goblin Bombardment + Gravelgill Axeshark

Mikaeus, the Unhallowed

Goblin Bombardment

Gravelgill Axeshark

How it works

1. Activate Goblin Bombardment by sacrificing Gravelgill Axeshark.
2. When Gravelgill Axeshark dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Resolve the Goblin Bombardment ability.
4. Activate Goblin Bombardment by sacrificing Gravelgill Axeshark.
5. When Gravelgill Axeshark 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.