Your Three Clans Will Be Executed? Fine, I'm the Crown Prince!

In the fourth year of the Tianshuo era of the Great Xia, six-year-old Wei Xuan, the [Sage Grandson Foretold in Dreams], dies. On the day of his burial, the imperial grandson's body mysteriously disappears… Ten years later! Wei Dongjun joins the Demon-Slaying Division of the Great Xia's Divine Strategy Bureau, starting out as a lowly laborer on the frontier. With sheer fearlessness, he slays demons and monsters at every turn, rising to become a fifth-rank thousand-household commander in the Yongzhou branch of the Demon-Slaying Division, his name entered into the records of Shenhuang City, the Xia capital. But then! Just as he thinks his future is looking bright, a treacherous schemer frames him for treason, putting the lives of one hundred thousand people in Heguan City on the line. In the end! Wei Dongjun's entire clan is executed, and he dies full of hatred… But then! [Ding! Life simulation complete. Calculating results…] Wei Dongjun opens his eyes in shock and finds himself three years in the past. Everything that just happened was merely a [Realistic Simulation] conducted by the System. What's more, the System can turn the demons and monsters he kills into simulated lifespan. With simulated lifespan, Wei Dongjun can endlessly simulate his way to the peak of martial arts! From [Sword-Draw Technique] to [One Sword Opens Heaven's Gate]! From [Tiger-Soul Body-Tempering Art] to [Five Emperors Undying Body]! Many years later, Wei Dongjun looks back. Behind him lie his long-dead enemies and mountains of divine and demonic bones. Beside him sits the aged Emperor Tianshuo, still on the dragon throne, his eyes alight with excitement. “My wonderful grandson! I knew you wouldn't let me down!” Wei Dongjun stares in astonishment, thinking the Emperor Tianshuo must be near death and out of his mind. But the Emperor Tianshuo continues with a shocking offer: “Dongjun, want to be emperor? Come, come! I'll hand the throne over to you!”