Answer:
When I point up, it's bright. When I point down, it's dark. What am I?
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
What has legs but doesn't walk?
You turn me over after you have traveled far. What am I?
I have two bodies joined together as one. When standing still I run and run.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.