Damn It, I Signed in the Underworld for a Thousand Years, I Am Invincible

Qin Yang traveled to the underworld and became a small undercover agent in Heishan County, Chujiang City. He originally thought that he would be in trouble in the mythical world where humans and immortals were everywhere, but he didn't expect that the sign-in system would awaken. The sign-in system allows you to sign in at any place in the underworld. I signed in on the first day and got the Xiantian Pill. I signed in the next day and got Hyakki Yakou. After signing in for a hundred years, you will get countless martial arts skills, innate spiritual treasures, acquired spiritual treasures, and fairy weapons. You will also get a small gift bag as a reward for golden immortal cultivation and a Donghuang Taiyi Dhamma Body Card. Just when Qin Yang was about to continue to live in obscurity, his bloodline in the human world was about to become extinct. The mournful voice reached the underworld, calling Qin Yanggong, the fifteenth generation of Qin Mansion, to take action to save the family. Qin Yang couldn't help but take action. … This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.