Answer:
I stay where I am when I go off. What am I?
I go up, let out a load and then go back down. What am I?
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
There are four of us but it seems like everyone loves spades the most.
What belongs to you but others use it more than you do?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.