Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight + Goblin Bombardment + Stormbound Geist

Eirdu, Carrier of Dawn // Isilu, Carrier of Twilight

Goblin Bombardment

Stormbound Geist

How it works

1. Activate Goblin Bombardment by sacrificing Stormbound Geist
2. When Stormbound Geist dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
3. Activate Goblin Bombardment by sacrificing Stormbound Geist
4. When Stormbound Geist dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
5. Resolve both Goblin Bombardment abilities from step 1 and 3.
6. Repeat.