I Have a Proficiency System for Cultivating Immortals

Wang Baobao traveled into a coffin at the beginning, thinking that he was going to end his short life. Unexpectedly, it was a blessing in disguise that he was bound to the proficiency system, thus starting his own path to immortality. When he comes back this time, Wang Baobao will repay all the grievances suffered by the original owner and become the best immortal in the world.