Title: 都市之不死天尊
Author: 萌萌哒小胖子
It is author's only book. 1988 chapters. Shitty and crappy translation from Webnovel as always. Read on Qidian or translate on my own. Per author's description we will have to see as chinese censorship "dark" and "grim" might as well be teenage cringe.
Update 1: Based on some of the messages on the book, it is hardly dark/grim. Looks like my predictions were pretty close. Shame. Likely just sail the high seas on this one.