I am runnig a homebre revolving around evil fey and lycanthropes. I have the book of shadow fey from ravenloft, looking to see if there's a 3X or PF book out there that gives advice to make lycanthropes more frightening or effective?
Curse of the Moon by Sean K Reynolds.
Lots of options, though it was intended for PC type werecritters as well.
Slaves of the Moon by PCI was pretty good stuff.
So there's no 3e version of Van Richten's werebeast book? I very much appreciate the suggestions so far but both books concern the mechanics for the game. I'm looking for some suggestions to make them more horrible.
Most 3rd-party books are going to deal with mechanics...
Under 3.5's Ravenloft published by Arthaus, there was:
Van Richten's Guide to the Mists (PDF Only, should be a free download somewhere)
Van Richten's Guide to the Shadow Fey
Van Richten's Guide to the Walking Dead
The Shadow Fey book might help you - I honestly don't recall the content in these, they're on the shelf, but that's at home.
I've seen Adventure Path #45 which has 4 pages towards them; Titled "Ecology of Lycanthropes" (P 71-75).