Toph, the First Metalbender + Toph, Hardheaded Teacher + Selesnya Sanctuary + Troubled Healer

Toph, the First Metalbender

Toph, Hardheaded Teacher

Selesnya Sanctuary

Troubled Healer

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 Troubled Healer 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. Resolve the Troubled Healer ability
8. Repeat.

This clever loop turns the battlefield into an engine by treating your free artifacts as lands through Toph, the First Metalbender, which synergizes with Selesnya Sanctuary entering and leaving. When you sacrifice that Sanctuary to Troubled Healer, its death sets off Toph, Hardheaded Teacher to bring the Sanctuary right back to the battlefield. That new entry forces you to return a land to your hand, and because Toph, the First Metalbender makes your free artifact count as a land, you can safely bounce that artifact back to your hand to recast it—fueling Toph, Hardheaded Teacher's cast triggers along the way.