Teshar, Ancestor's Apostle + Aether Channeler + Mana Vault + Yahenni, Undying Partisan

Teshar, Ancestor's Apostle

Aether Channeler

Mana Vault

Yahenni, Undying Partisan

How it works

1. Activate Yahenni by sacrificing Aether Channeler, giving Yahenni indestructible until end of turn.
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 Yahenni by sacrificing Aether Channeler, giving Yahenni indestructible until end of turn.
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 relies on Teshar, Ancestor's Apostle acting as your engine, transforming every historic spell you cast into a way to pull Aether Channeler straight out of your graveyard. As the Channeler repeatedly enters the battlefield, its versatility shines by bouncing your mana sources right back to your hand so you can recast them. Meanwhile, Mana Vault fuels the cycle by generating the raw mana needed to keep your artifacts moving, while Yahenni, Undying Partisan stands ready to sacrifice the Channeler on command and shield itself with indestructible.