I completed Sai Mota's quest, handed necklace to Eris and recevied legendary item from chest. I left sanctuary. Now how do I get Faculties of the Skull quest? There is no more portal near Eris on moon. Edit: I found the place where she "should" be when handing necklace but she's not there anymore. Eris that is located at the bottom of the map sellling bounties is not offering me the quest. Edit2: Not sure how, but I had it in my exotic collection. Topic closed.