Teshar triggers, returning Scrap Trawler from your graveyard to the battlefield.
Activate Lion's Eye Diamond by discarding your hand and sacrificing it.
Activate Viscera Seer by sacrificing Scrap Trawler.
When Scrap Trawler dies, it triggers, returning Lion's Eye Diamond from your graveyard to your hand.
Resolve the Viscera Seer ability.
Repeat.
This ingenious recursion loop is anchored by Teshar, Ancestor's Apostle, whose static ability turns every historic spell into a resurrection engine for cheap creatures. By sacrificing Scrap Trawler to Viscera Seer, you trigger Scrap Trawler's ability to return Lion's Eye Diamond from your graveyard to your hand. When you then recast Lion's Eye Diamond, Teshar triggers anew to bring Scrap Trawler right back to the battlefield, allowing you to generate infinite colored mana, death triggers, and scry 1s to set up your victory.