Doc Aurlock, Grizzled Genius + Mimic Vat + Eternal Scourge + Phyrexian Altar

Doc Aurlock, Grizzled Genius

Mimic Vat

Eternal Scourge

Phyrexian Altar

How it works

1. Activate Phyrexian Altar by sacrificing Eternal Scourge, adding 1.
2. When Eternal Scourge dies, Mimic Vat triggers, exiling Eternal Scourge from your graveyard.
3. Cast Eternal Scourge from exile by paying 1.
4. Repeat.

This clever loop relies on Eternal Scourge's unique ability to be cast directly from exile, turning exile into a personalized workshop of infinite recursion. By sacrificing the creature to Phyrexian Altar, you generate the exact mana needed to cast it again because Doc Aurlock, Grizzled Genius reduces that cost by {2}, making the Scourge completely free to recast. Meanwhile, Mimic Vat stands ready to swallow up the creature whenever it hits the graveyard, though its presence is merely a safety net here since the Scourge's own text does the heavy lifting to keep the engine running smoothly.