After Signing for a Hundred Years, Hundreds of Millions of People Begged Me to Come Out and Destroy the Demons

Qin Xuan traveled to a parallel world and was thrown into death row at the beginning. He thought he was destined to die, but he awakened to the sign-in system. It's just that this system is somewhat considerate. [Scan the world where the host is located and detect it as an ordinary urban world. [Urban sign-in system is opening...] [Buzz... Extreme danger warning! Retest! [It has been detected that the urban world where the host is located is in the midst of a resurgence of spiritual energy! [The urban sign-in system cannot guarantee the security of the host. This system is being upgraded...] Upgrade completed! [This system is renamed as the Xiuxian Sign-in System! [Sign in to the Holy Body of Chaos! [Sign in Nine Heavens Divine Thunder! [Sign in the heart of the thousand-year dragon blood tree! Sign in... Unknowingly, a hundred years have passed, the world has opened up, and demons have descended. The human race around the world cried out and asked Qin Xuan to come out and kill the demon. With one strike of Qin Xuan's sword, the souls of hundreds of millions of demons and monsters were wiped out! Only then did he realize that he was already invincible in the world.