C435 Strange ritual(part ii)

When I was circling the fire by myself, the others started circling around me as well. I saw a lot of graffiti on the walls, these graffiti looked familiar, it was something like black tentacles. After staring blankly for a while, I immediately remembered, isn't this the Infernal Hell Demon?

I know that there is a group of people who seem to have a unique faith in demons