Answer:
What is the heart of many risks, has a heart, but is not a living being?
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
It's anything but amusing when this body part gets hit.
I grow where no flower grows, where no light touches the walls, up or down, that I don't care, was here before people were.
When set loose I fly away. Never so cursed as when I go astray.
What covers its face with its hands, speaks no language, yet most known what it's saying?