Szarel, Genesis Shepherd + Puppeteer Clique + Goblin Bombardment

Szarel, Genesis Shepherd

Puppeteer Clique

Goblin Bombardment

How it works

1. Activate Goblin Bombardment by sacrificing Puppeteer Clique.
2. When Puppeteer Clique dies, its persist ability and Szarel trigger.
3. Resolve the persist trigger, returning Puppeteer Clique from your graveyard to the battlefield with a -1/-1 counter on it.
4. When Puppeteer Clique enters, it triggers, putting a creature card from an opponent's graveyard onto the battlefield under your control.
5. Resolve the Szarel trigger, putting a number of +1/+1 counters on another creature you control.
6. Resolve the Goblin Bombardment ability from step 1.
7. Activate Goblin Bombardment by sacrificing the creature returned in step 4.
8. When the creature dies, Szarel triggers, putting a number of +1/+1 counters on Puppeteer Clique.
9. Resolve the Goblin Bombardment ability.
10. Repeat.