Toph, the First Metalbender + Springheart Nantuko + Lotus Cobra

Toph, the First Metalbender

Springheart Nantuko

Lotus Cobra

How it works

1. At the beginning of your end step, Toph triggers, animating a land you control that enters the battlefield untapped.
2. During your next turn, cast Springheart Nantuko for its bestow cost by paying 1, attaching it to an animated land.
3. Play a land. When the land enters, Springheart Nantuko triggers, causing you to pay 1 to create a copy of the land it is attached to.
4. When the land token enters, Springheart Nantuko and Lotus Cobra trigger.
5. Holding priority, activate the land token by tapping it, adding at least 1.
6. Resolve the Lotus Cobra trigger, adding .
7. Resolve the Springheart Nantuko trigger, causing you to pay 1 to create a copy of the land it is attached to.
8. Repeat from step 4.

This clever loop turns your non-creature artifacts into a self-replicating engine by leveraging Toph, the First Metalbender to treat them as lands alongside Lotus Cobra and Springheart Nantuko. Once Toph animates one of these artifact-lands, bestowing Springheart Nantuko onto it creates a creature that can be repeatedly copied via land drops. Every time a new token copy enters the battlefield, Lotus Cobra generates the mana needed to keep paying Springheart Nantuko's landfall cost, cascading into an infinite chain of land tokens.