[DarkRanger]

Well, off the top of my head I can't think of an evil, druid friendly deity that a Drow would end up following. I'd suggest you consider cleric of Lolth or blackguard, of any evil power you want. As far as how to play one, just try to figure out what's so evil about them and play that up. Corrupt, sadistic, deceitful, all of the above?