Teshar triggers, returning Scrap Trawler from your graveyard to the battlefield.
Activate Tormod's Crypt by tapping and sacrificing it.
Activate Viscera Seer by sacrificing Scrap Trawler.
When Scrap Trawler dies, it triggers, returning Tormod's Crypt from your graveyard to your hand.
Resolve the Viscera Seer ability.
Repeat.
This clever loop relies on a recycling engine where every piece has a vital role to play. By casting Tormod's Crypt as a historic spell, you trigger Teshar, Ancestor's Apostle to pull Scrap Trawler right back out of your graveyard. You then sacrifice the Tormod's Crypt for its own effect and feed Scrap Trawler to Viscera Seer, which triggers Scrap Trawler's ability to return the sacrificed Tormod's Crypt straight back to your hand. Because Tormod's Crypt costs zero mana, you can recast it endlessly to repeat the cycle, letting you infinitely trigger your artifacts, churn through your library with Viscera Seer's scry, and build an astronomical storm count.