Lucifer's Return

Finally finished the walkthrough. The hero composition was 2 Archmages and a General. I liked the 3rd scenario the most, and the 2nd or 5th scenario turned out to be the most difficult. Killing Sureiz in the second scenario was almost as difficult as killing Lucik's guardians, because I made a mistake.
I'm curious, did you come up with the "6000 years" yourselves, or did you read it somewhere?