Answer:
Not a burden for its weight and daily carried out, He who takes it wishes it had never come about
A dragons tooth in a mortals hand, I kill, I maim, I divide the land.
They can be harbored, but few hold water. You can nurse them, but only by holding them against someone else. You can carry them, but not with your arms. You can bury them, but not in the earth.
Five hundred begins it, five hundred ends it. Five in the middle is seen. First of all figures, the first of all letters. Take up their stations between. Join all together, and then you will bring before you the name of an eminent king.
What is up thatβs also down? Whatβs a smile and a frown?
I am rarely touched but often held. If you are smart you'll use me well. What am I?