Answer:
I am a box that holds keys without locks, yet they can unlock your soul.
A house full, a yard full, a chimney full, no one can get a spoonful.
I follow the orders of only two. I respect the work of only two. I am in constant battles with many, Though one surpassed them all. With forces joined, We created hell, Until our mutual enemy fell. Who am I?
What five-letter word becomes shorter when you add two more letters?
What can you put in a barrel to make it lighter?
What did the piece of wood say when he saw the screwdriver and screws approaching?