When you sleep, your soul briefly returns to the place where it was created/goes to when it dies, and seeks nourishment. Everybody's soul is created with a little link (or you could say a greater entity calls it back) to that place so that it can return easily, but upon death, the soul returns via that and annihilates the link as if returns.
Also, as an added thingy, you could say the entity supplying the link, or residue of the links themselves, (whichever) is the source of all arcane power.
The Forest of Throck:
Throck forest is divided into three parts: a region of twisted black magic, which is dark and hemmed in with the legions of sable pine. This is Spindel, and is occupied by the hideous Ettercaps and their spider-pets. The second area is the chaotic elfin-wood, where the druids work their wyrd magic amongst the oaks. The last part is Udnalor, the home of the gnomes. Finding themselves surrounded by these chaotic forces they dwell as quietly as possible beneath the surface. Their culture is a fascinating one to visit, and in the next few miscellaneous ideas, I shall examine the ways and customs of THE GNOMES OF UDNALOR, with a view to role-playing them.