Teshar, Ancestor's Apostle, Aether Channeler, Mana Vault, and Ashnod's Altar

Prerequisites

• Teshar, Ancestor's Apostle on the battlefield
• Aether Channeler on the battlefield
• Mana Vault on the battlefield
• Ashnod's Altar on the battlefield
• if the permanent requires six or more mana to cast available

Steps

1. Activate Mana Vault by tapping it, adding
2. Activate Ashnod's Altar by sacrificing Aether Channeler, adding
3. Cast the historic permanent from your hand by paying its mana cost
4. Teshar triggers, returning Aether Channeler from your graveyard to the battlefield
5. When Aether Channeler enters the battlefield, it triggers, returning Mana Vault from the battlefield to your hand
6. Activate Ashnod's Altar by sacrificing Aether Channeler, adding
7. Cast Mana Vault 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 historic permanent cast in step 3 from the battlefield to your hand
10. Activate Ashnod's Altar by sacrificing Aether Channeler, adding
11. Repeat from step 3

Results

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