Answer:
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
What is shaped like a box, has no feet, and runs up and down?
I am brown and sticky
What can travel around the world while staying in a corner?
My days are numbered.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.