“ In some virtual forums going AFK is the equivalent of passing out drunk on the couch at a fraternity party. Everyone from hackers to everyday participants will take shots at you, and you can expect your avatar to look very different when you get back. Hopefully you will notice quickly.”
“ 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.”