Teshar, Ancestor's Apostle, Scrap Trawler, Yahenni, Undying Partisan, and Delif's Cone

Prerequisites

• Teshar, Ancestor's Apostle on the battlefield
• Scrap Trawler in the graveyard
• Yahenni, Undying Partisan 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 Yahenni by sacrificing Scrap Trawler
5. When Scrap Trawler dies, it triggers, returning Delif's Cone from your graveyard to your hand
6. Resolve the Yahenni ability
7. Repeat

Results

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