If you look you cannot see me. If you see me you cannot see anything else. I can make anything you want happen, but later everything goes back to normal.
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.
Rotten trees and Jack-O-Lanterns have this characteristic in common.See answer
Select a pack of riddles and try to solve it in an interesting way.
This riddle appears in the following downloadable PDF files: