Answer:
Old people and owls are said to be this.
Glittering points that downward thrust. Sparkling spears that do not rust. What is it?
What is it that no man ever saw, which never was, but always will be?
What do cheetas, dalmatians and appaloosas have in common?
Though I should be unique, you've made most of us the same. I would be stronger, if my characters were stranger.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.