Toph, the First Metalbender + Toph, Hardheaded Teacher + Bartolomé del Presidio + Dimir Aqueduct

Toph, the First Metalbender

Toph, Hardheaded Teacher

Bartolomé del Presidio

Dimir Aqueduct

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 Bartolomé del Presidio 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 Bartolomé del Presidio ability
8. Repeat.

This clever loop transforms a zero-mana artifact into an infinitely repeatable engine by turning your non-token artifacts into lands via Toph, the First Metalbender. Because Dimir Aqueduct enters the battlefield tapped and forces you to bounce a land, Toph, the First Metalbender ensures that your returned artifact counts as a valid land target for that bounce ability. Meanwhile, Bartolomé del Presidio gives you a sacrifice outlet to trigger the earthbend revival from Toph, Hardheaded Teacher when your artifact-land hits the graveyard.