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

Teshar, Ancestor's Apostle

Aether Channeler

Mana Crypt

Yahenni, Undying Partisan

How it works

1. Activate Yahenni by sacrificing Aether Channeler, giving Yahenni indestructible until end of turn.
2. Activate Mana Crypt by tapping it, adding CC.
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 Crypt from the battlefield to your hand.
6. Activate Yahenni by sacrificing Aether Channeler, giving Yahenni indestructible until end of turn.
7. Cast Mana Crypt 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 vintage-legal loop spins into motion by leveraging Teshar, Ancestor's Apostle as the engine that repeatedly resurrects Aether Channeler whenever you cast a historic spell like Mana Crypt. As Aether Channeler enters the battlefield, its ability bounces your artifacts back to your hand so they can be re-cast, fueling an endless chain of historic triggers while Yahenni, Undying Partisan stands ready to sacrifice the Channeler at a moment's notice. This constant recycling allows you to churn out infinite storm count, creature sacrifices, and enter-the-battlefield effects with absolute mechanical precision.