Relentless Dead + Necroduality + Thermopod

Relentless Dead

Necroduality

Thermopod

How it works

1. Cast Relentless Dead by paying .
2. When Relentless Dead enters the battlefield, Necroduality triggers, creating a token copy of it.
3. Activate Thermopod by sacrificing the nontoken Relentless Dead, adding .
4. When Relentless Dead dies, its first and second abilities trigger. Choose not to pay for either.
5. Activate Thermopod by sacrificing the token Relentless Dead, adding .
6. When the token Relentless Dead dies, its first and second abilities trigger.
7. Resolve the first trigger, choosing not to pay.
8. Resolve the second trigger, causing you to pay 2 to return Relentless Dead from your graveyard to the battlefield.
9. Repeat from step 2.

This looping engine transforms the synergy between tribal duplication and sacrifice outlets into an endless cycle of undeath. By leveraging Necroduality, every entry of Relentless Dead instantly spawns a token copy to double your presence on the board, which can then be fed directly into Thermopod to generate red mana and fuel the recursion costs. Because Relentless Dead's own death triggers allow you to cycle it back to your hand or pull another Zombie from the graveyard, the engine seamlessly sustains itself while generating infinite sacrifice, enter-the-battlefield, and death triggers.