Answer:
A dragons tooth in a mortals hand I kill I maim I divide the land.
Canine children.
I am in the past never in the future. I don't exist but have existed. I saw what you saw and that is what I will ever see.
What can be as big as an elephant but weighs nothing?
I am the key that is the hardest to turn
A man goes out in heavy rain with nothing to protect him from it. His hair doesn't get wet. How does he do that?