Answer:
What has thirteen hearts But no body or soul?
No matter how little or how much you use me, you change me every month.
A shimmering field that reaches far. Yet it has no tracks, And is crossed without paths.
I am two-faced but bear only one. I have no legs but travel widely. Men spill much blood over me. Kings leave their imprint on me. I have greatest power when given away, yet lust for me keeps me locked away.
What is lighter than what it is made of?
I can only be played on a windy day