One Hundred Lives Before Becoming a God

The war destroyed the earth's ecological environment and became no longer suitable for life. The earth's demise was in danger. Fortunately, a mysterious force came to help mankind gain the power to change the world. People called it divine power. It can exert supernatural power through a certain medium. Some people used it to protect the world, and some used it to plot evil. During a resistance, Zhang Xiaoyu sacrificed himself. Huh? Who am I? Am I not dead?