Is there an archetype for druids that lets them work well with vermin, particularly spiders? I have a new player who might play a drow druid, and I thought having a spider companion and some spidery wildshapes might be fun and flavorful.
If there isn't I don't see any reason you couldn't work one up rather easily, most of the animal specific archtypes tend to follow the same general jist on the abilities, I'm at work right now or else I'd do a quick write up for you. It sounds creative and I don't see anything breaking about the idea.
You don't need an archetype in Ultimate Magic Druids can take Vermin Companions here is a link from the PRD
-Edit- As for Wildshape you could just add spiders to the list of things he can Wildshape into or switch the normal Wildshape ability to change into animals to be able to change into vermin.
Cool, thanks DK!