Answer:
What is at the end of every rainbow?
Brothers and sisters I have none but this man's father is my father's son. Who is the man?
The buyer doesn’t want it, the producer doesn’t need it and the user doesn’t know their using it.
Mountains will crumble and temples will fall, and no man can survive its endless call. What is it?
Power enough to smash ships and crush roofs. Yet it still must fear the sun.
What is always coming but never arrives?