Answer:
Brothers and sisters I have none but this man's father is my father's son. Who is the man?
The eight of us go forth not back to protect our king from a foes attack.
It comes only before, it comes only after. Rises only in darkness, but rises only in light. It is always the same, but is yet always different.
You roll it or you buy it, People say you shouldn't try it, Because you may get a stroke, From inhaling all that smoke.
Inside a burning house, this thing is best to make. And best to make it quickly, before the fire's too much to take.
The more of me you take, the more I appear behind you. What am I?