some kind of animistic elemental thing, but not that like "everything is alive", pantheistic nature-worship deal. like super specific with names and maybe a harsh cosmology, like conan's Crom.

like maybe the sun is the eye of an angry, chaotic evil god that is slowly maiming the biosphere like a sadist uses a magnifying glass on ants. or maybe the chief god is a snake that lives in the water and makes it rain/flood and snatches people who get too close to fast moving water.

i have a weird idea of "fun", but i think a cool religion is one that makes me want to draw something dramatic and crazy.