Answer:
People are hired to get rid of me. I'm often hiding under your bed. In time I'll always return you see. Bite me and you're surely dead.
It is able to speak because it has a hard gone. You know what it is as soon as it has sung. What is it?
You must keep this thing. Its loss will affect your brothers. For once yours is lost, it will soon be lost by others.
We are five little objects of an everyday sort, You will find us all in a tennis court.
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.