Teshar, Ancestor's Apostle + Aether Channeler + Mana Vault + Viscera Seer

Teshar, Ancestor's Apostle

Aether Channeler

Mana Vault

Viscera Seer

How it works

1. Activate Viscera Seer by sacrificing Aether Channeler, causing you to scry 1.
2. Activate Mana Vault by tapping it, adding CCC.
3. Cast the other artifact with MV<=2 by paying at most 2.
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 Viscera Seer by sacrificing Aether Channeler, causing you to scry 1.
7. Cast Mana Vault by paying 0.
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.

This clever loop revolves around the synergy between Teshar, Ancestor's Apostle and Aether Channeler, using Teshar's triggered ability to repeatedly recur the Channeler whenever you cast a historic spell. Viscera Seer acts as the sacrificial outlet that sends Aether Channeler back to the graveyard while letting you sculpt your draws with infinite scry triggers. Meanwhile, Mana Vault provides the initial burst of colorless mana and gets bounced back to your hand by Aether Channeler's entry trigger, allowing you to recast it as a historic spell that restarts the entire cycle.