Mikaeus, the Unhallowed + Puppeteer Clique + Goblin Bombardment

Mikaeus, the Unhallowed

Puppeteer Clique

Goblin Bombardment

How it works

1. Activate Goblin Bombardment by sacrificing Puppeteer Clique.
2. When Puppeteer Clique dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Puppeteer Clique enters, it triggers, allowing you to put a creature card from an opponent's graveyard onto the battlefield under your control.
4. Resolve the Goblin Bombardment ability.
5. Activate Goblin Bombardment by sacrificing Puppeteer Clique.
6. When Puppeteer Clique dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
7. When Puppeteer Clique enters, it triggers, allowing you to put a creature card from an opponent's graveyard onto the battlefield under your control.
8. Resolve the Goblin Bombardment ability.
9. Repeat.

This loop turns Puppeteer Clique into a recurring nightmare for your opponents, siphoning every creature out of their graveyards while slaughtering them on the spot. By feeding Puppeteer Clique to Goblin Bombardment, you trigger both persist and undying alternately—backed by Mikaeus, the Unhallowed granting the latter keyword—so that the -1/-1 and +1/+1 counters endlessly cancel each other out upon return. Each time the Clique loops back onto the battlefield, its entry ability triggers anew to steal an adversary's fallen threat, which you can immediately sacrifice to Goblin Bombardment alongside the Clique itself for infinite damage and death triggers.