Activate Cauldron of Souls by tapping it, giving two nontoken artifact creatures persist until end of turn.
Activate Clock of Omens by tapping the nontoken artifact creatures, untapping Cauldron of Souls.
Activate Blasting Station by tapping it and sacrificing one of the nontoken artifact creatures that doesn't have a -1/-1 counter on it.
When the creature dies, its persist ability and Szarel triggers.
Resolve the persist trigger, returning the creature from your graveyard to the battlefield.
When the creature enters, Blasting Station triggers, untapping Blasting Station.
Resolve the Szarel trigger, putting a number of +1/+1 counters on the other artifact creature.
Resolve the Blasting Station ability from step 3.
Repeat from step 3 once, instead sacrificing the creature who had counters placed on it in step 6.
Repeat from step 1.
This clever loop harnesses the artifact synergy between **Clock of Omens** and **Cauldron of Souls** to continuously feed **Blasting Station** with sacrifices. When your artifact creatures die, **Szarel, Genesis Shepherd** counters the crippling -1/-1 counters from persist by distributing +1/+1 counters back onto them, resetting their ability to be sacrificed again. Because **Szarel, Genesis Shepherd** also lets you replay lands from your graveyard, the engine remains remarkably resilient while **Blasting Station** converts the endless cycle of sacrifices directly into infinite damage.