Teshar, Ancestor's Apostle + Aether Channeler + Mana Crypt + Ashnod's Altar

Teshar, Ancestor's Apostle

Aether Channeler

Mana Crypt

Ashnod's Altar

How it works

1. Activate Mana Crypt by tapping it, adding CC.
2. Activate Ashnod's Altar by sacrificing Aether Channeler, adding CC.
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 Crypt from the battlefield to your hand.
6. Activate Ashnod's Altar by sacrificing Aether Channeler, adding CC.
7. Cast Mana Crypt by paying 1.
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 CC.
11. Repeat from step 3.