Immortal and Demon Cultivation

The sea of ​​clouds is misty, the sky is infinite. Who among all living beings does not yearn for it? The way of heaven is illusory, no one can see it. In this world, who does not want to live forever? The resentful couple of three lives and seven lifetimes, the grievances and hatreds between the righteous and the evil sects for thousands of years. One person, one ancient sword, how will he face the whole world...