I messed around with this deck before. Inexperience + The powerful Clow = Demonic Presence. It was my first time trying a ritual with the clow cards, and I apparently opened a door for a nasty demonic force to come through. For about a week I was helpless to stop it, and watched it become stronger and stronger. We are talking a full blown apparition... It was visable and getting very strong. It could not enter my house so it would wait in my car for me. I would look out my window and see the Shadow Man's distinct figure facing foward in the passenger seat of my car waiting. I was at my friend's house, and I complained about my neck burning, it was a little pink dot, and about an hour later, it was a burning scratch that was being cut accross my neck. This happened like last week. I finally got desperate when I knew this thing was strong enough to probably enter my home, so I experimented with Light Energy, and was able to bind, and ultimately destroy this being that named himself as "Charlie"... My friend's reading on this thing signified it was lost, earthbound, dark, and that it would return. That was before I know what this was, and what do you know, it returned (It never will again, I obliterated it.) Long story short, DON'T MESS WITH THE CLOW UNLESS YOU UNDERSTAND THEM FULLY. (Hasn't touched the deck since.)