Toph, the First Metalbender + Toph, Hardheaded Teacher + Dimir Aqueduct + Coastal Hornclaw

Toph, the First Metalbender

Toph, Hardheaded Teacher

Dimir Aqueduct

Coastal Hornclaw

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 Coastal Hornclaw 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 Coastal Hornclaw ability
8. Repeat.

This ingenious loop turns your free artifact into an endlessly recurring trigger engine by leveraging Toph, the First Metalbender's static ability to treat nontoken artifacts as lands. With that foundation set, you cast your artifact to trigger Toph, Hardheaded Teacher, which earthbends Dimir Aqueduct into an animate creature-land. You then feed that animated bouncing land to Coastal Hornclaw's sacrifice ability; because Dimir Aqueduct died as a land, Toph, Hardheaded Teacher's earthbend clause returns it straight to the battlefield tapped. Its own entry trigger then fires, bouncing the original artifact back to your hand thanks to Toph, the First Metalbender, leaving you ready to replay it and do it all over again.