Doc Aurlock, Grizzled Genius + Squee, the Immortal + Pitiless Plunderer + Thermopod

Doc Aurlock, Grizzled Genius

Squee, the Immortal

Pitiless Plunderer

Thermopod

How it works

1. Activate Thermopod's second ability by sacrificing Squee, adding .
2. When Squee dies, Pitiless Plunderer triggers, creating a Treasure token.
3. Activate the Treasure by tapping and sacrificing it, adding .
4. Cast Squee from your graveyard by paying .
5. Repeat.

This loop turns Squee, the Immortal into an endlessly recurring sacrifice engine by leveraging his ability to be cast from the graveyard, though Doc Aurlock, Grizzled Genius isn't even strictly needed here since Squee's mana value is already a modest {1}{R}{R}. Once Thermopod is on the battlefield to feed on Squee for red mana, Pitiless Plunderer watches the goblin die and immediately kicks back a Treasure token to help pay the casting cost. By sacrificing and recasting Squee on loop, you effortlessly generate an infinite storm count alongside endless creature deaths, enters-the-battlefield triggers, and leaves-the-battlefield triggers.