Toph, the First Metalbender + Haru, Hidden Talent + Firdoch Core + Sylvan Safekeeper

Toph, the First Metalbender

Haru, Hidden Talent

Firdoch Core

Sylvan Safekeeper

How it works

1. Cast Firdoch Core by paying 3.
2. When Firdoch Core enters, Haru triggers, earthbending Firdoch Core, as it's a land due to Toph.
3. Activate Sylvan Safekeeper by sacrificing Firdoch Core.
4. When Firdoch Core dies, Haru triggers, returning Firdoch Core from your graveyard to the battlefield.
5. When Firdoch Core enters, Haru triggers, earthbending Firdoch Core, as it's a land due to Toph.
6. Repeat from step 3.
7. Resolve all Sylvan Safekeeper abilities.

This clever loop turns your entire board into a self-sustaining engine by letting Toph, the First Metalbender redefine Firdoch Core as a land alongside its artifact type. Because Firdoch Core also boasts changeling thanks to its creature typing, it counts as an Ally to continually trigger Haru, Hidden Talent upon entering the battlefield. From there, Sylvan Safekeeper steps in as the sacrifice outlet, sending the Core straight to the graveyard where Toph's earthbend clause and Haru's triggers seamlessly conspire to bounce it right back into play.