The Sinister Gu Healer

Zhang Tianci, a deliveryman struggling to make ends meet, is traveling deep into the mountains with his parents when an ancient parasite Gu accidentally takes root inside him. This mysterious Gu can devour strange diseases and help people live longer, while also absorbing life energy to strengthen its Host. It is both a heaven-defying golden finger and a death sentence. After rising to fame by using the Devouring Poison Divine Gu to cure terminal illnesses that wealthy patients and renowned doctors could do nothing about, he is immediately targeted by cultivation clans and hidden sects, and forced to flee and cultivate. Along the way, he meets his university classmate Lin Shiyin. Together, they roam the world, practicing medicine and helping the people while fighting the various factions coveting the Gu's power. From an insignificant nobody in the city to the supreme ruler of the Immortal Realm, he follows the path of poison and proves his Dao through Gu, ultimately becoming the one and only Devouring Gu Immortal Venerable of all ages, shaking the Three Realms!