Answer:
What is as big as you are and yet does not weight anything?
A dragons tooth in a mortals hand, I kill, I maim, I divide the land.
Two little holes in the side of a hill. Just as you come to the cherry-red mill.
I am the red tongue of the earth, that buries cities.
What can't you see, hear or feel, until its too late. What shadows love, and shopkeepers hate?
When is it bad luck to see a black cat?