Douluo: the Soul-Piercing Mirror Shadow Beast, I Help Oscar Become a God

(Reading books and abandoning my brain, I just couldn't find Oscar fans and had no choice but to write it myself) What? Are you actually a twin martial soul? What? Does your clone possess the power of an evil god? What? Your soul rings are all red except for the first ring? What? Do you have a pool of Titled Douluo cards that you carry with you? Oyin was suffering from an incurable disease, and his only pastime while he was hospitalized was to watch the Soul Fighting Continent anime. After becoming a fan, he began to read a series of original works. His favorite character was Oscar, who has the same surname as himself. After the fourth chemotherapy failed, Oyin's soul accidentally traveled through the book and became the Mirror Beast in his childhood. Being familiar with the plot, in order to avoid being killed by Oscar in the future, and to help his favorite character become a god, Oyin searched for Tianmeng and paved the way for becoming the second martial spirit...