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

Toph, the First Metalbender

Toph, Hardheaded Teacher

Phyrexian Altar

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 Phyrexian Altar 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. Repeat.

This elegant loop transforms your entire collection of cheap artifacts into a self-sustaining engine, powered entirely by Toph, the First Metalbender turning those non-token artifacts into lands. With that foundation set, casting a zero-mana artifact triggers Toph, Hardheaded Teacher to animate Simic Growth Chamber into a creature, allowing you to feed it directly to Phyrexian Altar for mana. Because the bouncing chamber is actually a land, its death trigger combined with Toph's earthbending return effect puts it right back onto the battlefield, where its normal entry trigger bounces your original artifact back to your hand to start the cycle anew.