Answer:
A piece of paper that takes most people 3 or 4 years to get.
I am a type of cheese made backwards
With three eyes and as black as night I frequently knock down ten men with a single strike!
A man who was outside in the rain without an umbrella or hat didn't get a single hair on his head wet. Why?
They took me from my mother's side where I was bravely bred and when to age I did become they did cut off my head. They gave to me some diet drink that often made me mad but it made peace between two kings and made two lovers glad.
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.