Toph, the First Metalbender + Haru, Hidden Talent + Stonework Puma + Krark-Clan Grunt

Toph, the First Metalbender

Haru, Hidden Talent

Stonework Puma

Krark-Clan Grunt

How it works

1. Cast Stonework Puma by paying 3.
2. When Stonework Puma enters, Haru triggers, targeting Stonework Puma as it is a land due to Toph.
3. Activate Krark-Clan Grunt by sacrificing Stonework Puma.
4. When Stonework Puma dies, Haru triggers, returning Stonework Puma from your graveyard to the battlefield tapped.
5. When Stonework Puma enters, Haru triggers, targeting Stonework Puma as it is a land due to Toph.
6. Resolve the Krark-Clan Grunt ability.
7. Repeat from step 3.

This clever loop turns your nontoken artifacts into lands thanks to Toph, the First Metalbender, allowing Stonework Puma to count as a land when it enters the battlefield. Because Stonework Puma enters as an Ally, it triggers Haru, Hidden Talent's earthbend ability to continually target and animate itself. You then feed Stonework Puma to Krark-Clan Grunt as an artifact sacrifice, which triggers Haru's return effect to send the creature right back to the battlefield tapped to restart the cycle.