Teshar, Ancestor's Apostle, Scrap Trawler, Carrion Feeder, and Dark Sphere

Prerequisites

• Teshar, Ancestor's Apostle on the battlefield
• Scrap Trawler in the graveyard
• Carrion Feeder on the battlefield
• Dark Sphere in hand

Steps

1. Cast Dark Sphere by paying its mana cost
2. Teshar triggers, returning Scrap Trawler from your graveyard to the battlefield
3. Activate Dark Sphere by tapping and sacrificing it
4. Activate Carrion Feeder by sacrificing Scrap Trawler
5. When Scrap Trawler dies, it triggers, returning Dark Sphere from your graveyard to your hand
6. Resolve the Carrion Feeder ability
7. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite storm count
• Infinite +1/+1 counters on Carrion Feeder