Toph, the First Metalbender + Toph, Hardheaded Teacher + Carrion Feeder + Boros Garrison

Toph, the First Metalbender

Toph, Hardheaded Teacher

Carrion Feeder

Boros Garrison

How it works

1. Cast the artifact by paying 0.
2. Toph, Hardheaded Teacher triggers, earthbending Boros Garrison.
3. Resolve the artifact spell.
4. Activate Carrion Feeder by sacrificing Boros Garrison.
5. When Boros Garrison dies, Toph, Hardheaded Teach triggers, returning Boros Garrison from your graveyard to the battlefield tapped.
6. When Boros Garrison enters, it triggers, returning the artifact cast in step 1 from the battlefield to your hand, as it's a land due to Toph, the First Metalbender.
7. Resolve the Carrion Feeder ability
8. Repeat.

This clever loop turns the battlefield into an engine by letting Toph, the First Metalbender redefine your nontoken artifacts as lands, which crucially allows Boros Garrison to bounce them back to your hand when it enters. As you cast and recast your free artifact, Toph, Hardheaded Teacher triggers to continuously earthbend Boros Garrison into a creature, making it vulnerable to Carrion Feeder's sacrifice outlet. Whenever Carrion Feeder consumes the animated land, its earthbend safety net brings Boros Garrison right back to the battlefield tapped, instantly restarting the bounce-and-sacrifice cycle for boundless triggers and counters.