I loved this one Xianxia series, but the translator dropped it and it doesn't seem like anyone would pick this series up. "MC is completely evil" and "stupidly complex magic system used to make MC more OP" are understandable criticisms of this series but I myself can't get enough of them and want another Xianxia series that has those. Especially with an MC that can take revenge as efficiently as he does. Is there any series like it?
http://www.novelupdates.com/series/otherworldly-evil-monarch/ Former master assassin reincarnated/body swapped with useless playboy noble heir. Complex cultivation system that the MC sidetracks with his own more complicated cultivation method. Using his former playboy image to cover his back street actions and personally considers himself evil (like picking on the super LG female noble child and using brains to rob minor villains). Edit http://www.novelupdates.com/series/so-what-if-its-an-rpg-world/ Very light hearted but MC is able almost every skill in a stereotypical RPG world. Everyone thinks MC is a hero but really only looking out for himself (such as stealing the royal treasury of the nation that gave him a job just because he could and for a quest). Even Satan had to personally stop him from burning an entire city right after he acquired terrorist title (but due to various reasons the world still considers him a hero). Also the heart breaker for all lolis.
There aren't any translated that hold up to the standards of the 'no holds barred' MC of MER. The problem is that in this community many people are pretty white-knightish and have ignorantly strict morals/a shallow perception of reality. I personally love MER and stories like it so it frustrates me to see the lack of stories on the same caliber of MER in terms of the phrase 'no holds barred'. Edit: OEM is by the same author but it has some differences.
If it isnt xianxia, then yobidasa reta satsuriku sha or the Summoned Slaughterer are the only thing in my mind thats close enough to MER's unrestraint killings.
You really like to promote your own work huh... i've seen you several times already... Try Xian Ni, an evil mc, have a revenge plot, created by Er Gen, author of ISSTH
It's not xianxia, but Katahane no Riku has a similar MC that has disregard for human lives in her thirst for revenge. It has gore and the MC has no qualms about brutally killing people from her past.
An arrogant MC? Alrighty then.....try out: Dragon Martial Emperor (Almost Identical) ATG (Hate the novel, but go ahead and try it out if you want) Heavenly Jewel Change (Arrogant MC in my opinion) An Evil MC/#1 Fan Fic (for me): RISE OF THE LICH
If you want to promote, please do so on original section, some people will gladly help... Oh, also i forgot to mention this to TS, if you want reaaally evil mc, try RRL re:hamster... muahahahaha