Review Detail of omgitsaray in As An Immortal, I Only Learn Forbidden Skills

The story started off great, where mc hid himself to slowly cultivate. He would use forbidden techniques to power up faster at a cost of damaging his body. But since he has an immortal body, he would heal up and just get stronger. This was going great because the whole premise of the novel was based on mc hiding and cultivating, then doing some major thing before hiding again. But this all suddenly changed around chapter 275 or so when mc disguised himself as different people and just when forbidden ground hunting, one after another to level up. It then turned to any other cliche cultivation novel out there. Kill this person, kill that, look for treasure, rinse and repeat. This could have been so much better if the author stuck to the original formula instead of deviating to a fighting/treasure hunting fest.