Toph, the First Metalbender + Toph, Hardheaded Teacher + Altar of Dementia + Dimir Aqueduct

Toph, the First Metalbender

Toph, Hardheaded Teacher

Altar of Dementia

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 Altar of Dementia 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 Altar of Dementia ability
8. Repeat.

This clever engine turns free artifacts into an infinite sacrifice loop by leveraging Toph, the First Metalbender, whose static ability reclassifies all your nontoken artifacts as lands. With that foundation set, you cast a zero-mana artifact to trigger Toph, Hardheaded Teacher, earthbending Dimir Aqueduct into a creature so it can be fed directly to Altar of Dementia. When Dimir Aqueduct is sacrificed, its death triggers the return effect, and its subsequent entry lets it bounce the original zero-mana artifact right back to your hand thanks to its land status—ready to be recast and repeat the entire cycle.