Goblin Bombardment + Grazing Kelpie + Hardened Academic

Goblin Bombardment

Grazing Kelpie

Hardened Academic

How it works

1. Activate Goblin Bombardment by sacrificing Grazing Kelpie.
2. When Grazing Kelpie 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 Grazing Kelpie.
4. Resolve the Goblin Bombardment ability.
5. Repeat.

This looping mechanism turns the recursive nature of persist into a lethal engine, using Goblin Bombardment as the ultimate outlet to continuously hurl sacrifice fodder at any target for infinite damage and death triggers. Grazing Kelpie anchors the loop by continually dying and resurrecting with its persist mechanic, but the secret catalyst that keeps the cycle going indefinitely is Hardened Academic. Whenever Grazing Kelpie leaves the graveyard, Hardened Academic's static-triggered ability places a +1/+1 counter on it, which immediately annihilates the -1/-1 counter through state-based actions and primes the Kelpie to persist all over again.