A Smart Contract.
The Devil pays a visit. (Complimentary Read)
I can assure you that I screwed up the page numbering today, and had multiple pages with the same number, as I felt like I was in deep trance. By the time I came out of it, I had no idea which pages went where, and now it is a bit of a wordplay. I know the right page order is here, but it will take some re-reading.