I Told You to Seek Death, Not Become Invincible

After transmigrating and binding to a Death-Seeking System, I can earn a 10-billion-yuan reward and return to my original world as soon as I die. So I start recklessly courting death! First, I seize the emperor's harem. I suppress the immortals above and destroy the demons below, only to discover that I'm invincible in the mortal realm. With no other choice, I can only grit my teeth and do whatever I please, playing the whole world in the palm of my hand...