Toph, the First Metalbender + Toph, Hardheaded Teacher + Overgrown Estate + Boros Garrison

Toph, the First Metalbender

Toph, Hardheaded Teacher

Overgrown Estate

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 Overgrown Estate 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 Overgrown Estate ability
8. Repeat.

This clever loop transforms a humble zero-mana artifact into a self-sustaining engine by letting Toph, the First Metalbender redefine all your nontoken artifacts as lands, making a piece like Boros Garrison able to bounce the artifact back to your hand as it enters. Meanwhile, Toph, Hardheaded Teacher provides the initial earthbending to turn that Boros Garrison into a land-creature so it can be sacrificed to Overgrown Estate for life. When Boros Garrison dies, its earthbending replacement effect sends it straight back to the battlefield tapped rather than the graveyard, setting up its entry trigger all over again to keep the cycle spinning infinitely.