Teshar, Ancestor's Apostle, Scrap Trawler, Umbral Collar Zealot, and Delif's Cone

Prerequisites

• Teshar, Ancestor's Apostle on the battlefield
• Scrap Trawler in the graveyard
• Umbral Collar Zealot on the battlefield
• Delif's Cone in hand

Steps

1. Cast Delif's Cone by paying its mana cost
2. Teshar triggers, returning Scrap Trawler from your graveyard to the battlefield
3. Activate Delif's Cone by tapping and sacrificing it
4. Activate Umbral Collar Zealot by sacrificing Scrap Trawler
5. When Scrap Trawler dies, it triggers, returning Delif's Cone from your graveyard to your hand
6. Resolve the Umbral Collar Zealot ability
7. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite storm count
• Infinite surveil 1