Painless Maniac: I Became Invincible After Joining the Demon Clan

(No system + high martial arts + urban imagination + bloody violence + single female protagonist with cp) Luo Cheng, a painless patient, traveled through the world of high martial arts with his soul and inherited the original owner's [Immortal Shura Body]. He is a waste that is not suitable for any martial arts except for the self-healing ability to amplify pain! When he was forced to join the wolf demon clan, what awaited him was the careful care from the wolf demon clan, as well as a massive amount of training resources and techniques! You say I can't practice? Sorry, I relied on self-abuse to become invincible. You said I can't break through the limit? But my limit is to trample the whole world under my feet! This is the story of how a man abandoned by fate used his most crippled talent to reach the most invincible peak!