Toph, the First Metalbender + Toph, Hardheaded Teacher + Bloodflow Connoisseur + Boros Garrison

Toph, the First Metalbender

Toph, Hardheaded Teacher

Bloodflow Connoisseur

Boros Garrison

How it works

1. Cast the artifact by paying 0.
2. Toph, Hardheaded Teacher triggers, earthbending Boros Garrison.
3. Resolve the artifact spell.
4. Activate Bloodflow Connoisseur by sacrificing Boros Garrison.
5. When Boros Garrison dies, Toph, Hardheaded Teach triggers, returning Boros Garrison from your graveyard to the battlefield tapped.
6. When Boros Garrison 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 Bloodflow Connoisseur ability
8. Repeat.

This ingenious loop turns Toph, the First Metalbender's static ability into a land-conversion engine, transforming any cheap artifact into a land type on the battlefield so that Boros Garrison's entry trigger can bounce it back to your hand. By having Toph, Hardheaded Teacher animate that very same Boros Garrison into a creature via earthbending, you create a renewable sacrifice target for Bloodflow Connoisseur. Whenever Boros Garrison hits the graveyard, Toph, Hardheaded Teacher's earthbend-related return clause brings the land right back to the battlefield, setting off an endless cascade of repeatable sacrifices and triggers.