The little rainbow unicorn was very rare. Only once in a blue moon did one appear; one in ten thousand did you get one. He lived in a cave which had walls coloured like a rainbow. He grazed outside his cave on grass the colour of the rainbow. The fairy dust was used for the protection of the shield which covered the fairy village. The shield was there to protect the village from nasty horrible Goblins. They were nasty because they had giant warts at the end of their noses. Plus, they also had nasty green slime running from them. Mr. McGregor got chased into the unicorn's cave by Blackie. They met face to face with each other. "My name is Mr.McGregor, but you can call me Mac." "My name is Urnst." Said the little Unicorn. To find out what happens next, you will need to read the book.