Teshar, Ancestor's Apostle + Scrap Trawler + Ashnod's Altar + Welding Jar

Teshar, Ancestor's Apostle

Scrap Trawler

Ashnod's Altar

Welding Jar

How it works

1. Cast Welding Jar by paying its mana cost.
2. Teshar triggers, returning Scrap Trawler from your graveyard to the battlefield.
3. Activate Welding Jar by sacrificing it.
4. Activate Ashnod's Altar by sacrificing Scrap Trawler.
5. When Scrap Trawler dies, it triggers, returning Welding Jar from your graveyard to your hand.
6. Repeat.

This loop is a masterclass in recursive recycling, using Teshar, Ancestor's Apostle as the engine that continuously resurrects Scrap Trawler from the graveyard every time you cast a historic spell. Ashnod's Altar provides the colorless mana to recast your cheap artifacts while feeding the death triggers that make Scrap Trawler's ability function. The crucial linchpin here is Welding Jar, which can be sacrificed for zero mana to trigger Scrap Trawler's retrieval ability and return itself right back to your hand, fueling the historic casting requirement over and over again.