Szarel, Genesis Shepherd + Cauldron of Souls + Clock of Omens + Goblin Bombardment

Szarel, Genesis Shepherd

Cauldron of Souls

Clock of Omens

Goblin Bombardment

How it works

1. Activate Cauldron of Souls by tapping it, giving two nontoken artifact creatures persist until end of turn.
2. Activate Clock of Omens by tapping the nontoken artifact creatures, untapping Cauldron of Souls.
3. Activate Goblin Bombardment by sacrificing one of the nontoken artifact creatures that doesn't have a -1/-1 counter on it.
4. When the creature dies, its persist ability and Szarel triggers.
5. Resolve the persist trigger, returning the creature from your graveyard to the battlefield.
6. Resolve the Szarel trigger, putting a number of +1/+1 counters on the other artifact creature.
7. Resolve the Goblin Bombardment ability.
8. Repeat from step 3 once, instead sacrificing the creature who had counters placed on it in step 6.
9. Repeat from step 1.

This ingenious loop relies on turning your artifacts into an infinite cycle of rebirth and power growth. By using Cauldron of Souls to grant persist to your artifact creatures, you set the stage to sacrifice them to Goblin Bombardment for damage and death triggers. Clock of Omens acts as the engine's gearwork, utilizing those very artifact creatures to untap the Cauldron so you can keep the persist train rolling. Meanwhile, Szarel, Genesis Shepherd watches over the carnage, converting each sacrifice into a cascade of +1/+1 counters that neatly cancel out the -1/-1 counters from persist, ensuring your creatures never stay down for good.