Sage of Medicine, Immortal Physician

As a child, Ruan Di obtained a book of spiritual herbs. In his innocence, he used it to forge a spiritual root for himself, though he was never meant to cultivate, and from then on became bound to medicine. Medicine can cure the ailments of mortals and heal the hearts of immortals. Everyone gets sick, and anything in the world can be used as medicine. On the long road of cultivation, where can you find the remedy meant for you...?