Toph, the First Metalbender + Toph, Hardheaded Teacher + Coastal Hornclaw + Arid Archway

Toph, the First Metalbender

Toph, Hardheaded Teacher

Coastal Hornclaw

Arid Archway

How it works

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

This ingenious loop turns a zero-mana artifact into an endlessly repeatable engine by leveraging Toph, the First Metalbender to transform your non-token artifacts into lands. Once the artifact hits the battlefield, Toph, Hardheaded Teacher triggers its earthbend ability, setting up Arid Archway as an animate land ready to be sacrificed to Coastal Hornclaw. When Arid Archway heads to the graveyard, its death triggers Toph's earthbend return ability, bringing it right back to the battlefield tapped. That new entry triggers Arid Archway's own bounce ability, allowing you to pick up the original artifact—which is currently treated as a land—back to your hand to recast it and repeat the cycle indefinitely.