I have read in the description of the Something Wicked expansion for A Touch of Evil on BoardGameGeek that the expansion contains additional rules that include "expanded challenge for cooperative play," but I don't see the rules posted in the files section. We've had a fairly easy time at beating the base game co-operatively and so I'm curious what changes in a co-op game with this expansion. A different shadow track? Bonuses for the Villain? More frequent mystery cards?
Unfortunately, Flying Frog Productions seems to be very worried that people will not buy their expansions if the post the rules for them. With that being said, what the most likely mean by, "expanded challenge for cooperative play," is that a new Advanced Cooperative Mystery Phase Chart is rolled on (2d6) versus the old chart (1d6 - quoted below) before drawing and reading the Mystery Card.