Teshar, Ancestor's Apostle + Blasting Station + Nurturing Pixie

Teshar, Ancestor's Apostle

Blasting Station

Nurturing Pixie

How it works

1. Cast an artifact in your hand by paying 0.
2. Teshar triggers, returning Nurturing Pixie from your graveyard to the battlefield.
3. When Nurturing Pixie enters, it and Blasting Station trigger.
4. Resolve the Nurturing Pixie trigger, returning another artifact that can be cast for 0 from the battlefield to your hand.
5. Resolve the Blasting Station trigger, untapping it.
6. Resolve the artifact spell cast in step 1.
7. Activate Blasting Station by tapping it and sacrificing Nurturing Pixie
8. Repeat.