Scouring Swarm + Drownyard Temple + Thermopod + Coastal Hornclaw

Scouring Swarm

Drownyard Temple

Thermopod

Coastal Hornclaw

How it works

1. Activate Coastal Hornclaw by sacrificing Drownyard Temple.
2. Each Scouring Swarm you control triggers, creating a tapped token copy of itself.
3. Resolve the Coastal Hornclaw ability.
4. If you control four or more Scouring Swarms, activate Thermopod by sacrificing a Scouring Swarm, adding .
5. Repeat step 4 until you control three Scouring Swarms or until you have 3 available, whichever comes first.
6. Activate Drownyard Temple by paying 3, returning it from your graveyard to the battlefield.
7. Repeat.

This loop transforms your graveyard into a perpetual motion machine by using Coastal Hornclaw to repeatedly sacrifice Drownyard Temple, which hits the threshold to fuel Scouring Swarm's terrifying copy engine once your graveyard is deep enough. Every time a new swarm is generated, Thermopod steps in as the sacrifice outlet to convert those extra bodies into the red mana you need. That mana then pays directly to recur Drownyard Temple back to the battlefield, restarting the cycle to generate an infinite storm of creature tokens, sacrifice triggers, and red mana.