Answer:
Take one royal word in the plural and make it singular by adding one letter
What can you easily break but never touch?
What must be looked through in order to see?
It is something you make after you've weighed your options.
It's what light turns into in the night
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.