Answer:
Break it and it is better, immediately set and harder to break again.
Fatherless and motherless. Born without sin, roared when it came into the world. And never spoke again.
My life can be measured in hours. I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
Who eats a lot of iron without getting sick?
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?
People take me on walks and I run and have fun. What am I?