Teshar, Ancestor's Apostle, Aether Channeler, Mana Crypt, and Carrion Feeder

Prerequisites

• Teshar, Ancestor's Apostle on the battlefield
• Aether Channeler on the battlefield
• Mana Crypt on the battlefield
• Carrion Feeder on the battlefield

Steps

1. Activate Carrion Feeder by sacrificing Aether Channeler, putting a +1/+1 counter on it
2. Activate Mana Crypt by tapping it, adding
3. Cast the other artifact with MV<=2 by paying at most
4. Teshar triggers, returning Aether Channeler from your graveyard to the battlefield
5. When Aether Channeler enters the battlefield, it triggers, returning Mana Crypt from the battlefield to your hand
6. Activate Carrion Feeder by sacrificing Aether Channeler, putting a +1/+1 counter on it
7. Cast Mana Crypt by paying
8. Teshar triggers, returning Aether Channeler from your graveyard to the battlefield
9. When Aether Channeler enters the battlefield, it triggers, returning the other artifact from the battlefield to your hand
10. Repeat

Results

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