I Used the Sign-In System for a Hundred Years and Seized the Demon Race's Holy Lord

Ye Han transmigrated to a high-martial world and spent a hundred years as the Demon King’s sign-in System, until one day the System crashed and Ye Han took over the Demon King’s body. He also gained the ability to sign in on behalf of others. When Ye Han signs in for someone else, he gets rewards amplified by a huge multiplier!

System: Sign-in for the Seventh Elder successful. The Seventh Elder receives the Great Might Heavenly Dragon and Ksitigarbha Secret Art. Host receives the tenfold-enhanced Great Might Heavenly Dragon and Ksitigarbha Secret Art!

System: Sign-in for the Sword Immortal of Wine successful. The Sword Immortal of Wine receives the Divine Sword Art of Thunder. Host receives the hundredfold-enhanced Divine Sword Art of Thunder!

System: Sign-in for the Nine Extremes Saintess successful. The Nine Extremes Saintess receives the Record of Supreme Detachment. Host receives the ten-thousandfold-enhanced Record of Supreme Detachment...

Ye Han’s arrival helped the declining demonic path rise again, provoking the righteous sects to launch a concerted attack. Eight top-tier orthodox sects and the righteous armies of sixteen imperial dynasties surrounded Demon Venerable Mountain. The demon race was on the brink of annihilation.

From within Demon Venerable Mountain emerged a towering figure.

One man, one sword. He slaughtered heaven and earth, invincible against all!

This novel and its characters are entirely fictional. Any similarities are purely coincidental. Do not imitate.