Goblin Bombardment + Twilight Shepherd + Hardened Academic

Goblin Bombardment

Twilight Shepherd

Hardened Academic

How it works

1. Activate Goblin Bombardment by sacrificing Twilight Shepherd.
2. When Twilight Shepherd dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Hardened Academic triggers, putting a +1/+1 counter on Twilight Shepherd.
4. Resolve the Goblin Bombardment ability.
5. Repeat.

This brilliant loop turns Twilight Shepherd into an infinite artillery shell by leveraging the persistent cycle of life and death. When you sacrifice Twilight Shepherd to Goblin Bombardment, its persist ability brings it back with a -1/-1 counter, but Hardened Academic steps in to immediately neutralize that drawback by placing a +1/+1 counter on it whenever cards leave your graveyard, allowing these counters to cleanly annihilate each other. Because Twilight Shepherd enters the battlefield anew each time, its own triggered ability keeps returning any cards put into your graveyard from the battlefield that turn, ensuring your engine never runs dry while Goblin Bombardment converts the cycle into endless damage.