Doc Aurlock, Grizzled Genius + Rest in Peace + Eternal Scourge + Ashnod's Altar

Doc Aurlock, Grizzled Genius

Rest in Peace

Eternal Scourge

Ashnod's Altar

How it works

1. Activate Ashnod's Altar by sacrificing Eternal Scourge, adding CC.
2. Eternal Scourge is exiled instead of being put into your graveyard due to Rest in Peace.
3. Cast Eternal Scourge from exile by paying 1.
4. Repeat.

This loop is a masterclass in turning exile into an engine, anchored by Rest in Peace ensuring that nothing ever truly reaches the graveyard. When you sacrifice Eternal Scourge to Ashnod's Altar for two colorless mana, Rest in Peace intercepts it and redirects it straight to exile. Because Doc Aurlock, Grizzled Genius reduces the cost of spells cast from exile by {2}, your original three-mana Eldrazi Horror can now be recast for just a single generic mana. Replaying Eternal Scourge for one mana while getting two back from Ashnod's Altar yields infinite colorless mana, along with an endless stream of creature sacrifices, enters-the-battlefield triggers, and storm count.