If you had an unusual amount of gold and silver at your disposal, where would you put it? Would the fear of the night stalkers run the risk of hiring to many inept gaurds to patrol your home to keep your coins safe? Would the gardener that you have known for years now look suspicious because he asked how your business was doing? Look no further, let the Coinlenders Guild protect your coins and wipe your worries away.
- Coinlenders Guild Advertizment.
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.