God-Level Simulation: from Killing Everyone to Being Invincible!

I, Gu Changye, the number one genius of the Demon Suppressing Division, have been slaying demons for the Daqian Dynasty for ten years! But he was framed by a powerful man, betrayed by his best friend, and ended up with his whole family executed! In Caishikou, I watched helplessly as my relatives died, and I was beheaded as a demon! However... [Ding! Congratulations to the host for completing his first life simulation! [God-level life simulator, activating...] Only then did I realize that this tragic life was just a simulation of life! Being a teenager again, I smiled. Is this world full of monsters? Great, they are all experience packages for me to obtain [Simulated Longevity]! Is it difficult to practice the exercises? It doesn't matter! [Simulate for five years, build a glazed jade body, and kill the enemy with one punch! [Simulate for fifteen years, build the body of gods and demons, and cut through the sky with one sword! As long as my longevity is enough, I can make infinite deductions and reach the end of martial arts! In my previous life, you regarded me as a chess piece, and you could manipulate me as you pleased. In this life, I hold a sword as a chess player, use gods and demons as my sons, and overturn the whole world!