Requires

Teshar, Ancestor's Apostle must be on the battlefield. Aether Channeler must be on the battlefield. Mana Crypt must be on the battlefield. Phyrexian Altar must be on the battlefield. You have a historic permanent card in hand that can be cast using and two colored mana. Mana needed: if the permanent requires three or more mana to cast

Steps

1. Activate Mana Crypt by tapping it, adding .
2. Activate Phyrexian Altar by sacrificing Aether Channeler, adding one mana of any color.
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 Phyrexian Altar by sacrificing Aether Channeler, adding one mana of any color.
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 historic permanent cast in step 3 from the battlefield to your hand.
10. Activate Phyrexian Altar by sacrificing Aether Channeler, adding one mana of any color.
11. Repeat from step 3.

Results