Teshar, Ancestor's Apostle + Scrap Trawler + Krark-Clan Grunt + Dark Sphere

Teshar, Ancestor's Apostle

Scrap Trawler

Krark-Clan Grunt

Dark Sphere

How it works

1. Cast Dark Sphere by paying its mana cost.
2. Teshar triggers, returning Scrap Trawler from your graveyard to the battlefield.
3. Activate Dark Sphere by tapping and sacrificing it.
4. Activate Krark-Clan Grunt by sacrificing Scrap Trawler.
5. When Scrap Trawler dies, it triggers, returning Dark Sphere from your graveyard to your hand.
6. Resolve the Krark-Clan Grunt ability.
7. Repeat.

This clever loop relies on a recursive exchange of artifacts fueled by Teshar, Ancestor's Apostle and Scrap Trawler working in tandem. Whenever you cast the cheap artifact Dark Sphere, Teshar’s historic trigger plucks Scrap Trawler out of your graveyard, setting the stage for Krark-Clan Grunt to sacrifice Scrap Trawler to its own activation. That sacrifice triggers Scrap Trawler's ability, allowing you to recur Dark Sphere right back to your hand so you can recast it, while Dark Sphere itself gets sacrificed along the way to trigger the whole cycle anew.