Answer:
Many hear me, but no one sees me, and I only speak when spoken to
Though easy to spot, when allowed to plume, It is hard to see, when held in a room.
This thing all things devours: Birds, beasts, trees, flowers; Gnaws iron, bites steel; Grinds hard stones to meal; Slays king, ruins town, And beats high mountains down.
Inside a great blue castle lives a shy young maid. She blushes in the morning and comes not out at night.
What binds two people yet touches only one?
When is it bad luck to see a black cat?
Difficult
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?