Toph, the First Metalbender + Toph, Hardheaded Teacher + Dimir Aqueduct + Phantom Train

Toph, the First Metalbender

Toph, Hardheaded Teacher

Dimir Aqueduct

Phantom Train

How it works

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

This ingenious loop turns a zero-mana artifact into an engine of endless triggers by cleverly rewriting the rules of the battlefield with Toph, the First Metalbender, which permanently transforms your nontoken artifacts into lands. This status allows Dimir Aqueduct to treat that looping artifact as a land for its bounce trigger when it enters the battlefield, while Toph, Hardheaded Teacher ensures the bounceland safely returns from the graveyard whenever Phantom Train consumes it for parts. By repeatedly recasting your artifact to feed the engine, you can generate infinite sacrifice triggers, landfall events, and creature stats on the Phantom Train.