Long ago there was a cult who worshipped Bast, the fickle goddess of Felines. Their temple has fallen, and the cult dispersed and all that remains is a silver wand adorned with the holy symbol of bast, a cat with emeralds for eyes…
Sometimes a sword’s value is not determined by magical properties, of gilding and jewels. Sometimes it’s value comes from it’s deeds and it’s history
Small bits of precious metal, and flawless jewels woven into the mane of a noble steed
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.