Rebirth of the Evil Ancestor

During the God-killing War, the Evil Ancestor's spiritual body was destroyed, and its fragments were scattered across the three realms. The original god entered the divine body, demon body, demon soul, and human body. How can the Evil Ancestor's followers retrieve the fragments from different time and space, different continents, and different spiritual bodies and resurrect the Evil Ancestor? Is the resurrected Evil Ancestor still the same one who can reverse time and space and holds the complete book of life and death?