I've Been in the Forbidden Area for Twenty Years, and I'm Invincible

The holy son of Chengtian Shen Sect traveled through time, but was deprived of his Dantian because of stealing the sect's holy medicine, and was finally imprisoned in the forbidden area of ​​​​Death and Death, Sealed Demon Valley. Already indifferent, Wang Xiaofeng awakened the sign-in system at the critical moment. Sign in at the gate of the forbidden area to obtain the heaven-level martial arts Nine Heavens Sword Art. Sign in at the Demon Altar to obtain the ancient alchemy. Sign in at the Dragon King Pond to get the dragon essence and blood. "Don't be arrogant, I haven't signed in today, otherwise you would have become a corpse!"