Teshar, Ancestor's Apostle, Scrap Trawler, Extruder, and Welding Jar

Prerequisites

• Teshar, Ancestor's Apostle on the battlefield
• Scrap Trawler in the graveyard
• Extruder on the battlefield
• Welding Jar in hand

Steps

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 Extruder by sacrificing Scrap Trawler
5. When Scrap Trawler dies, it triggers, returning Welding Jar from your graveyard to your hand
6. Resolve the Extruder ability Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite storm count