Answer:
I begin your sentences.
Crooked as a rainbow and slick as a plate, ten thousand horses can't pull me straight. What am I?
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.
Tear me off and scratch my head what once red is now black.
I am like thunder in your cranium
How can you throw a ball as hard as you can, to only have it come back to you, even if it doesnβt bounce off anything?