Nether Traitor + Kheru Goldkeeper + Carrion Feeder + Garrison Excavator

Nether Traitor

Kheru Goldkeeper

Carrion Feeder

Garrison Excavator

How it works

1. Activate Carrion Feeder by sacrificing Nether Traitor.
2. Activate Carrion Feeder by sacrificing another creature.
3. When the creature dies, Nether Traitor triggers, causing you to pay to return Nether Traitor from your graveyard to the battlefield.
4. Kheru Goldkeeper and Garrison Excavator triggers, creating a Treasure token and a creature token
5. Resolve the Carrion Feeder ability.
6. Activate the Treasure by tapping and sacrificing it, adding .
7. Repeat.

This loop turns the graveyard into a revolving door by repeatedly feeding creatures to Carrion Feeder, setting off a cascade of triggers every time Nether Traitor hits the dirt and pays its black mana tax to crawl back out. The real engine is fueled by Kheru Goldkeeper and Garrison Excavator, whose passive-adjacent triggers watch cards leave the graveyard and instantly pay back the cost by spitting out a Treasure token and a 2/2 Spirit token. That generated Treasure provides the exact black mana needed to sustain Nether Traitor's return indefinitely, letting you endlessly pump Carrion Feeder's size while farming infinite deaths, leaves-the-yard triggers, and wide boards of tokens.