Welcome to Uhgramudd, you'll never find a more disgusting, remote, fly-ridden, swampy Hell than this. Get in, kill the Lizards, grab the loot, get out. Simple, right?
This is an introductory low-level adventure I use to get familiar with players I meet online, to see if our play styles clash in any way. So far, it has weeded out a few undesirables and scored a few keepers. I am quite satisfied with the layout and have run it multiple times, with slight variations for level/abilities of the player characters.
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.