Infinite Reincarnation, Starting from Contradicting the Empress and Becoming Invincible!

The good news is that Qin Changsheng traveled to the parallel world Blue Star. The bad news is that this body has terminal cancer and only has three months to live. Fortunately, I awakened the god-level retrospective system. Travel through random worlds through dreams, and return to continue traveling through dreams. What? Being targeted by the emperor? What can you do to me? If you kill me, I will copy your ability to become stronger and continue to be reborn and travel through time. As a result, Qin Changsheng embarked on the road of infinite death. The more people die, the stronger I become... Three months later, when cancer was about to spread throughout his body, Qin Changsheng returned with the Emperor's cultivation. I am a great emperor, but I can still be killed by cancer? What does not exist, infinite reincarnation and rebirth, I will eventually achieve immortality!