Here's a suggestion.
Maybe a witch being burning at the stake at night.
Villagers with pitchforks and torches surrounding a large bonfire with a tall stake in the center of a high mound of wood. The witch of course is tied to the stake. If you want to get creative or supernatural, the witch could have gotten free of her bonds and an is summoning spirits or something else to help her.
Whatever you do the Halloween picture on, I'll look forward to seeing it.
No, I wasn't thinking about showing somebody getting burned. Didn't want you to create a gory picture. I was more or less thinking that they were in the process of lighting the high mound of wood. I didn't describe that very well. Oh well.
I do like the idea that Chrispy92 came up with in the comment below. Perhaps an Native American spirit dance. Ghost of coyotes, ravens, bears, surrounding the dance.
If not, hopefully somebody will come up with a good idea for you.
I dunno how to make that work, but it's the first thing that came to mind.