In the dank,dense areas of the world where the vigorous and the decaying are intertwined and indivisable, lives the wise bagabond. But getting him to impart his knowledge is quite a chore.
This vast and ancient organism played an important part in the mysterious organization of the cosmos, facilitating the isolated development of inteligent species.
Blibs are generally genial in nature, posessing malicious thoughts only for the flying insects they eat. But regardless of their peacful predispositions, bodily harm is inevitable if one happens to be standing in a blib’s shadow as it falls out of the sky.
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.