Read Dark Star Emperor Manga:
Su Xiaobai was on the brink of death, he was brought into a new world. The soul of the strongest evolver "King of Stars" Long Ming now inhabits his body. Therefore, he has acquired an extremely powerful ability : "The Endlessness of Dim". The only drawback is that if Xiaobai ever gets a boner, he will experience severe pain. However, when he will have found the murderer of Long Ming and ascended the throne more.. of Protoss Palace, this weakness will disappear...