Woodfall Primus + Goblin Bombardment + Hardened Academic

Woodfall Primus

Goblin Bombardment

Hardened Academic

How it works

1. Activate Goblin Bombardment by sacrificing Woodfall Primus.
2. When Woodfall Primus dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Hardened Academic and Woodfall Primus trigger.
4. Resolve the Hardened Academic trigger, putting a +1/+1 counter on Woodfall Primus.
5. Resolve the Woodfall Primus trigger, destroying target noncreature permanent.
6. Resolve the Goblin Bombardment ability
7. Repeat.