Teshar, Ancestor's Apostle + Umbral Collar Zealot + Mirkwood Nurturer

Teshar, Ancestor's Apostle

Umbral Collar Zealot

Mirkwood Nurturer

How it works

1. Cast an artifact in your hand by paying 0.
2. Teshar triggers, returning Mirkwood Nurturer from your graveyard to the battlefield.
3. When Mirkwood Nurturer enters, it triggers, returning another artifact that can be cast for 0 from the battlefield to your hand.
4. Resolve the artifact spell cast in step 1.
5. Activate Umbral Collar Zealot by sacrificing Mirkwood Nurturer
6. Repeat.

This clever loop is anchored by Teshar, Ancestor's Apostle, whose static ability keeps resurrecting low-cost creatures whenever you cast a historic spell. By cycling a zero-mana artifact back and forth to your hand, you fuel Mirkwood Nurturer's entering-the-battlefield trigger to bounce that same artifact right back to your hand for reuse. Meanwhile, Umbral Collar Zealot provides the vital sacrifice outlet to send Mirkwood Nurturer back to the graveyard so Teshar can bring it out all over again, while simultaneously letting you surveil through your library.