Toph, the First Metalbender + Toph, Hardheaded Teacher + Phyrexian Altar + Orzhov Basilica

Toph, the First Metalbender

Toph, Hardheaded Teacher

Phyrexian Altar

Orzhov Basilica

How it works

1. Cast the artifact by paying 0.
2. Toph, Hardheaded Teacher triggers, earthbending Orzhov Basilica.
3. Resolve the artifact spell.
4. Activate Phyrexian Altar by sacrificing Orzhov Basilica.
5. When Orzhov Basilica dies, Toph, Hardheaded Teach triggers, returning Orzhov Basilica from your graveyard to the battlefield tapped.
6. When Orzhov Basilica 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. Repeat.

This clever loop transforms a free artifact into an infinite engine by leveraging the passive land-types granted by Toph, the First Metalbender, which turns your nontoken artifacts into lands. This status allows Orzhov Basilica's enters-the-battlefield trigger to pick up that 0-mana artifact, while Phyrexian Altar provides the sacrificial outlet to convert your earthbent lands into any color of mana. As you sacrifice the animated Orzhov Basilica, Toph, Hardheaded Teacher capitalizes on the revolving door of spells and land transformations to fuel endless creature deaths, triggers, and mana.