Looking for a demon [I Have Had Weird Dreams]

So I was having this dream that was one of those vivid intense ones that felt more like a hallucination or vision state than a dream. I asked to find the demon that has harassed me over the years. The dream changed and I was looking at a castle on this fiery lake of lava. It was an absolutely massive castle that went on as far as the eye could see. It was pitch black and smouldering, some flames were coming off it here and there. It was incredibly elaborately carved with designs.

At one point I was inside the castle. It was littered with traps and there were many, many people being held prisoner there. They desperately wanted to escape but no one had ever succeeded.

I never did see the demon I was looking for.