Toph, the First Metalbender + Toph, Hardheaded Teacher + Altar of Dementia + Simic Growth Chamber

Toph, the First Metalbender

Toph, Hardheaded Teacher

Altar of Dementia

Simic Growth Chamber

How it works

1. Cast the artifact by paying 0.
2. Toph, Hardheaded Teacher triggers, earthbending Simic Growth Chamber.
3. Resolve the artifact spell.
4. Activate Altar of Dementia by sacrificing Simic Growth Chamber.
5. When Simic Growth Chamber dies, Toph, Hardheaded Teach triggers, returning Simic Growth Chamber from your graveyard to the battlefield tapped.
6. When Simic Growth Chamber 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 loop transforms a free artifact into an infinite sacrifice engine by turning your entire board into lands. With Toph, the First Metalbender redefining your nontoken artifacts as lands in addition to their other types, playing a zero-mana artifact lets Toph, Hardheaded Teacher trigger its earthbend ability on Simic Growth Chamber. From there, you sacrifice Simic Growth Chamber to Altar of Dementia to mill an opponent, taking advantage of the land's built-in death safety net or looping it right back. When Simic Growth Chamber hits the graveyard and triggers Toph, Hardheaded Teacher to return it, its own entry trigger forces you to bounce that original zero-mana artifact back to your hand—which Toph, the First Metalbender treats as a land—ready to cast all over again.