Hello everyone. I seriously LOVE lucid dreaming, am doing it for 5-6 years now, almost every night I feel like it. But about 1 week ago, I had something that I could not stop. I think through the years I got pretty experienced in this, I know how to do stuff and what NOT to do. This time, I was flying around (my favorite thing to do in dreams), landed in a skyscraper, and rolled a joint (you can actually feel high). I also love destroying cities in my dreams, now I tried to make my country a peaceful place where are no crimes and harm. While I was doing the job ( killing everyone corrupt ), I started to feel immerse pain in my back, but only sometimes, for like 5-6 seconds, when I moved away from a place, it stopped, when I stopped, it started. Soon, I heard a voice "What you are doing at nights will kill the world itself." Then, a black demon like creature appeared (he was like 3-4x me, veery big) I was like fuck you, i will do whatever I want in my own dreams, now begone." When i said my sentence, I tried to do my trademarked killing skill (turning the body inside out, then disappearing), it didnt work. I couldn't do anything to that creature. When i was staring at him, I could feel the pain not in my back but it felt like its my soul. I immediately woke up, I was freaked out, this NEVER happened to me in my dreams. Next day, I didnt even try lucid dreaming. But after the next night, I said "Fuck that, it must be some mistake", and did lucid dream that night. In the middle of my dream I started to feel the immerse pain again. As soon as I felt it i woke up... the pain is nothing you can actually compare. Next day, I WANTED to know what is it. I absorbed some strength and went to sleep again. Nothing happened now like yesterday, the early dream was all good. Then I started to feel it again. I said "Show yourself and tell me who the fuck you are!!" He appeared right in front of me, and said: "You are already marked. The light will soon fade from dreams." The pain started to get VERY strong, so I woke myself up. Next day at night, I went to take a shower. I noticed a black line on my calf, and it just dont come off. We tried everything but it isnt even fading a little. It was 3 days ago, and the line is still not fading. I haven't done any lucid dreaming since then. What can it be? Someone have experience like this? I need someones help... this is serious.