Answer:
Lovely and round I shine with pale light grown in the darkness a lady's delight.
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
Can not be bought, Can not be sold, Even if it's made of gold. What is it?
I work when I play and play when I work. What am I?
I can swim but never get wet. I can run but never get tired. I follow you everywhere but never say a word. What am I?
What is always coming but never arrives?