Thermopod + Dualcaster Mage + Second Sunrise

Thermopod

Dualcaster Mage

Second Sunrise

How it works

1. Cast Second Sunrise by paying its mana cost
2. Holding priority, cast Dualcaster Mage by paying its mana cost.
3. When Dualcaster Mage enters, it triggers, targeting Second Sunrise.
4. Holding priority, activate Thermopod by sacrificing Dualcaster Mage.
5. Resolve the Dualcaster Mage trigger, copying Second Sunrise
6. Resolve the Second Sunrise copy, returning Dualcaster Mage from your graveyard to the battlefield.
7. Repeat from step 3.

This clever loop turns a single casting of Second Sunrise into a self-sustaining engine of resurrection and sacrifice. By casting Second Sunrise and responding with Dualcaster Mage, you set up an ETB trigger that copies the spell back onto the stack; sacrificing the Mage to Thermopod in response ensures it hits the graveyard just in time to be brought right back along with any other casualties. Thermopod conveniently provides the red mana needed to keep casting your spells while translating every iteration into an infinite supply of sacrifices, triggers, and mana.