Answer:
When the son of the water returns to the parent, it dies. What is it?
What is lighter than what it is made of?
It's got twists and turns, but has no curves. Twist it to fix it, turn it to ruin it. What is it?
Iron on a mammal. Mammal on your feet.
A dragons tooth in a mortals hand, I kill, I maim, I divide the land.
Brings the sky a lot closer.