Primal Prayers + Enduring Renewal + Blasting Station

Primal Prayers

Enduring Renewal

Blasting Station

How it works

1. Cast the creature that causes you to get energy counter(s) when it enters the battlefield by paying E due to Primal Prayers.
2. When the creature enters the battlefield, it and Blasting Station trigger.
3. Resolve the creature's trigger, causing you to get at least E.
4. Resolve the Blasting Station trigger, untapping it.
5. Activate Blasting Station by tapping it and sacrificing the creature.
6. When the creature dies, Enduring Renewal triggers, returning the creature from your graveyard to your hand.
7. Resolve the Blasting Station ability, dealing 1 damage to any target.
8. Repeat.

This brilliant loop turns the restriction of casting small creatures into an infinite damage engine, heavily reliant on Primal Prayers letting you cast a qualifying creature for just a single energy counter rather than its normal mana cost. Once that creature hits the battlefield, Blasting Station untaps from the entry trigger and stands ready to sacrifice it, while its death immediately triggers Enduring Renewal to bounce the creature right back to your hand. Because Enduring Renewal ensures you can replay the creature using the energy generated by Primal Prayers, you can endlessly loop this cycle to feed Blasting Station infinite sacrifices, untaps, and damage to any target.