Activate Need for Speed by sacrificing Orzhov Basilica.
When Orzhov Basilica dies, Toph, Hardheaded Teach triggers, returning Orzhov Basilica from your graveyard to the battlefield tapped.
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.
Resolve the Need for Speed ability
Repeat.
This ingenious loop turns your zero-mana artifact into an endlessly repeatable engine by leveraging Toph, the First Metalbender's static ability, which cleverly transforms your nontoken artifacts into lands. With that foundation set, you cast your artifact to trigger Toph, Hardheaded Teacher, which animates Orzhov Basilica into a creature via earthbend. You then sacrifice that very same Orzhov Basilica to Need for Speed's activation cost; its death triggers Toph, Hardheaded Teacher's safety net to return it straight to the battlefield. Finally, Orzhov Basilica's own entry trigger forces you to return a land to your hand, and since your zero-mana artifact counts as a land, it bounces right back to your hand, ready to be cast all over again for an infinite storm and landfall chain.