Thermopod + Faceless Butcher + Metamorphosis Fanatic

Thermopod

Faceless Butcher

Metamorphosis Fanatic

How it works

1. Cast Faceless Butcher by paying its mana cost.
2. When Faceless Butcher enters, its first ability triggers, exiling Metamorphosis Fanatic.
3. Activate Thermopod by sacrificing Faceless Butcher.
4. When Faceless Butcher dies, its second ability triggers, returning Metamorphosis Fanatic from exile to the battlefield.
5. When Metamorphosis Fanatic enters, it triggers, returning Faceless Butcher from your graveyard to the battlefield.
6. When Faceless Butcher enters, its first ability triggers, exiling Metamorphosis Fanatic.
7. Repeat from step 3.

This infinite loop hinges on a recursive exchange between Faceless Butcher and Metamorphosis Fanatic, where entering and leaving the battlefield continually triggers each other's resurrection and exile abilities. Thermopod serves as the engine's catalyst, converting the constant stream of creature sacrifices into a steady supply of red mana while simultaneously enabling the loop to feed itself.