Necropolis will be a place you have to travel through at least twice: Once for Artur's Gift and once for Lau's Discipline. To get entry, please see the quests here. Necropolis is filled with death and demons. What more could you want? The creatures here might be holding on to something you will need!

Quick tips: there is an abandoned church deep in Necropolis where you can take refuge for a bit. Avoid puddles.