Answer:
Although I'm not an insect, some people found me very difficult to exterminate. They called me something like 'insane priest.' The first half of my name means the same as 'scrape,' & my last three letters are a metal. Who am I?
Whoever makes it, tells it not. Whoever takes it, knows it not. And whoever knows it wants it not
Thirty white horses on a red hill, first they champ, then they stamp, then they stand still.
Fatherless and motherless. Born without sin, roared when it came into the world. And never spoke again.
A harvest sown and reaped on the same day In an unplowed field, Which increases without growing, Remains whole though it is eaten Within and without, Is useless and yet The staple of nations.
It is something you make after you've weighed your options.