Was working on gettings some more motifs for my crafter, so was doing the Dark Brotherhood questline to unlock Sacraments. One of the early DB quests ports you to a small map called Jerall Mountains. That place is filled with mats and seems to pop rather fast. It's a shared instance map that you can only get to when doing the quest afaik. Quest in question is called: Questions of Faith.

http://elderscrollsonline.wiki.fextr...tions+of+Faith