Not bad, but I would change it to:
"It is said by the ancients that we, mankind, are created for one and only purpose … to be the toys of the Gods. We are given life and when the time comes we give it back. This is our circle, our fate. We have accepted it.
In the past we craved prosperity. We were devoted to the Gods. We built temples to earn their love and at the end to go in peace. But times have changed. People started sacrificing more to some Gods and gave nothing to others. That was the turning point in our history. The conflict between the Gods was inevitable and we were in the middle. Mankind changed.
When people start to believe that evil is necessary to survive, the playground of the Gods is revealed. An ancient Castle rises to plague the World with shadows and madness. The ones who are lucky enough to escape death are scattered and afraid to trust anyone.
In this time of need many orders were created to protect the defenseless. And to this day mankind suffers in the shadows."