Toph, the First Metalbender + Haru, Hidden Talent + Firdoch Core + Oxidda Daredevil

Toph, the First Metalbender

Haru, Hidden Talent

Firdoch Core

Oxidda Daredevil

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 Oxidda Daredevil 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. Resolve the Oxidda Daredevil ability.
7. Repeat from step 3.

This ingenious loop relies on Toph, the First Metalbender turning your nontoken artifacts into lands, effectively rewriting the rules of the battlefield so that Firdoch Core is recognized as both an artifact and a land simultaneously. Because Firdoch Core possesses changeling, it counts as an Ally, allowing its entry to trigger Haru, Hidden Talent and immediately earthbend it into a creature. From there, you simply sacrifice Firdoch Core to Oxidda Daredevil to feed its ability, which conveniently triggers Haru, Hidden Talent a final time to return the core safely back to the battlefield—ready to repeat the cycle indefinitely.