Googling my arse off and for the life of me I can't find it! It was a 'random nemesis success' table. Each 'x' amount of in-game time, you rolled to see what success or failure a particular nemesis, protagonist, villain had. You had to acquire enough points (totals of your rolls) before the arch-villain could move on. It was a 'ticking clock' in the background so-to-speak.