Automated Assembly Line + Gonti's Aether Heart + Demon of Dark Schemes + Altar of Dementia

Automated Assembly Line

Gonti's Aether Heart

Demon of Dark Schemes

Altar of Dementia

How it works

1. Activate Automated Assembly Line by paying EEE, creating a 3/3 Robot artifact creature token.
2. When the Robot enters the battlefield, Gonti's Aether Heart triggers, causing you to get EE.
3. Activate Altar of Dementia by sacrificing the Robot.
4. When the Robot dies, Demon of Dark Schemes' second ability triggers, causing you to get E.
5. Resolve the Altar of Dementia ability, causing target player to mill cards equal to the Robot's power.
6. Repeat.

This loop turns your energy reserves into a self-sustaining engine of relentless mill and sacrifice. You begin by spending the energy gathered by Automated Assembly Line to forge a 3/3 Robot artifact creature token, which immediately triggers Gonti's Aether Heart to refill your energy supply upon entering the battlefield. From there, you feed that freshly minted token to Altar of Dementia, sending cards straight from the library into the graveyard while triggering Demon of Dark Schemes to recoup the final piece of energy needed to do it all over again.