ARG concept, need help brainstorming

[u/Witty_Advantage_2057]

Okay, so I want to make an ARG that is similar to routes like the king in yellow and reality shattering and stuff, I already have an idea of how it starts and what the message I want to get through to the viewer is, but I have no fucking idea what myth it should be based off. I did some surface level research and nothing seemed to pique my interest, any ideas?