Teshar, Ancestor's Apostle + Aether Channeler + Mana Vault + Blasting Station

Teshar, Ancestor's Apostle

Aether Channeler

Mana Vault

Blasting Station

How it works

1. Activate Blasting Station by tapping it and sacrificing Aether Channeler, dealing 1 damage to any target.
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 and Blasting Station trigger.
6. Resolve the Aether Channeler trigger, returning Mana Vault from the battlefield to your hand.
7. Resolve the Blasting Station trigger, untapping it.
8. Activate Blasting Station by tapping it and sacrificing Aether Channeler, dealing 1 damage to any target.
9. Cast Mana Vault by paying 0.
10. Teshar triggers, returning Aether Channeler from your graveyard to the battlefield.
11. When Aether Channeler enters the battlefield, it and Blasting Station trigger.
12. Resolve the Aether Channeler trigger, returning the other artifact from the battlefield to your hand.
13. Resolve the Blasting Station trigger, untapping it.
14. Repeat.

This infinite loop relies on Teshar, Ancestor's Apostle acting as your engine, continually resurrecting Aether Channeler whenever you cast a historic spell like Mana Vault. As Aether Channeler enters the battlefield, its trigger bounces your mana source or artifact right back to your hand to recast it, while Blasting Station provides both the sacrifice outlet to clear the board and an easy way to untap itself via creature entry triggers. By sacrificing Aether Channeler to Blasting Station for damage and relooping your artifacts, you turn this recursion into an infinite barrage of damage and death triggers.