Teshar triggers, returning Scrap Trawler from your graveyard to the battlefield.
Activate Delif's Cone by tapping and sacrificing it.
Activate Umbral Collar Zealot by sacrificing Scrap Trawler.
When Scrap Trawler dies, it triggers, returning Delif's Cone from your graveyard to your hand.
Resolve the Umbral Collar Zealot ability.
Repeat.
This elegant loop turns the humble **Delif's Cone** into a recursive engine by leveraging **Teshar, Ancestor's Apostle** as the heartbeat of the operation. Whenever you cast the Cone—a historic spell—Teshar responds by pulling **Scrap Trawler** back from the graveyard, setting up a cascading recovery system where sacrificing the Trawler to **Umbral Collar Zealot** triggers its ability to return the Cone right back to your hand. Meanwhile, the Zealot's sacrifice outlet lets you constantly feed the loop while surveilling through your deck.