Answer:
What's always coming, but never arrives?
Take one royal word in the plural and make it singular by adding one letter
What does someone else have to take before you can get?
Sends paper without using the post office.
Glittering points that downward thrust. Sparkling spears that do not rust. What is it?
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.