Editing Setting:Planescape Improvement Project (section)

====Traits====
* The atmosphere is hard to breath
* Plants (except undead ones) struggle to grow here because it is never daytime, and there is little water
* Casting certain spells, particularly healing and resurrection and some spells that affect plants, attract the attention of nearby undead creatures and have a chance of failing. This effect gets stronger while underground.
* Most necromancy spells and some that harm the living are strengthened and easier to cast. This effect gets stronger while underground.
* Soulless undead creatures that survive here long enough can eventually awaken and develop a new soul. They tend to copy the alignment of the people they have been around. Attempting to resurrect an undead creature inhabited by a soul that isn't the original has unpredictable and possibly dangerous results.
* Over time, Undead creatures can also transform into other kinds of undead. A simple skeleton may eventually become a lich, although without a phylactery. Non-corporeal undead can also slowly form bodies for themselves out of the bones and rotting flesh of the plane.
* Souls that end up on this plane first appear as weak ghosts.
* Living things that die here immediately come back as undead, usually zombies. Corporeal undead with souls, and living things whose bodies are destroyed, come back as incorporeal undead.
* Incorporeal undead cannot move on to their proper afterlife unless they leave the plane.
* It is always night time and the full moon is always in the middle of the sky, no matter where you are on the plane. This full moon strangely does not trigger the transformation of lycanthropes. Occasionally, the moon turns red, and bad things happen.