Answer:
When the son of the water returns to the parent, it dies. What is it?
Many hear me, but no one sees me, and I only speak when spoken to
A certain wizard resided in a city made from this gemstone.
I cost no money to use, or conscious effort to take part of. And as far as you can see, there is nothing to me. But without me, you are dead.
A device for finding furniture in the dark.
Before I grow I'm small. When I'm old I grow tall. When I die I give a mighty fall.