Toph, the First Metalbender + Toph, Hardheaded Teacher + Thermopod + Selesnya Sanctuary

Toph, the First Metalbender

Toph, Hardheaded Teacher

Thermopod

Selesnya Sanctuary

How it works

1. Cast the artifact by paying 0.
2. Toph, Hardheaded Teacher triggers, earthbending Selesnya Sanctuary.
3. Resolve the artifact spell.
4. Activate Thermopod by sacrificing Selesnya Sanctuary.
5. When Selesnya Sanctuary dies, Toph, Hardheaded Teach triggers, returning Selesnya Sanctuary from your graveyard to the battlefield tapped.
6. When Selesnya Sanctuary 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 clever loop turns the battlefield into a recursive engine by leveraging Toph, the First Metalbender, whose static ability turns your nontoken artifacts into lands. With that foundation set, casting a zero-cost artifact triggers Toph, Hardheaded Teacher to animate Selesnya Sanctuary, which you can immediately sacrifice to Thermopod for red mana. Because Selesnya Sanctuary is a land, its death triggers the safety net of its own earthbend return—or simply allows it to loop right back into your hand via its bounce trigger when it hits the battlefield, picking up the cheap artifact you just cast so you can repeat the process indefinitely.