Answer:
A dagger thrust at my own heart, dictates the way I'm swayed. Left I stand, and right I yield, to the twisting of the blade.
What has three feet but no arms or legs?
My sides are firmly laced about, Yet nothing is withinอพ You'll think my head is strange indeed, Being nothing else but skin.
Neither bought nor sold but more valuable than gold. It is built but not by hand. What is it?
There are millions of me. I am very small but when moving fast I am deadly.
Iโm grown from darkness but shine with a pale light. Very round I am and always a lady's delight.