From Wildermyth Wiki

Faction Overview

Deepists are a cult and the creatures they venerate. Likes include horns, rocks, and a lack of sunlight.

They are slavish zealots to a weird religion, which itself was born of heroes-gone-wrong, their goal is conversion, a grand pyramid scheme serving best those near the top.

There is some old, discarded Deepist Lore and maybe a villain or two.