Toph, the First Metalbender + Toph, Hardheaded Teacher + Dimir Aqueduct + Troubled Healer

Toph, the First Metalbender

Toph, Hardheaded Teacher

Dimir Aqueduct

Troubled Healer

How it works

1. Cast the artifact by paying 0.
2. Toph, Hardheaded Teacher triggers, earthbending Dimir Aqueduct.
3. Resolve the artifact spell.
4. Activate Troubled Healer by sacrificing Dimir Aqueduct.
5. When Dimir Aqueduct dies, Toph, Hardheaded Teach triggers, returning Dimir Aqueduct from your graveyard to the battlefield tapped.
6. When Dimir Aqueduct 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 Troubled Healer ability
8. Repeat.

This clever loop relies on Toph, the First Metalbender turning your artifacts into lands, transforming your zero-mana artifact into a legal sacrifice target for Troubled Healer. Once Dimir Aqueduct is sent to the graveyard, Toph, Hardheaded Teacher steps in to immediately rescue it and return it to the battlefield tapped. When the bouncyland enters, its own trigger forces you to return your zero-mana artifact to your hand, allowing you to recast it and repeat the cycle endlessly.