_Crystal_ I agree with the @MasterRabbink, putting it this general will entice many shameless authors to advertise their own novels (myself included).
However, for a little less shamelessness, I would suggest some other novels
Finding My Freedom In Another World, It is a fun novel to read, however, sadly, the true author of this novel has either dropped it or left it on hiatus without warning to anyone, even to the one publishing it on this site for her (with permission), I hope she is okay, and really hope she comes back to us.;,;. No harem, guaranteed by author
I Didn't Even Want to Live, But God Forced Me to Reincarnate!, this one is hilarious, I really enjoy the unique re-incarnation plot and the way that this is simply a fantasy slice of life that stems from a reincarnation.;,;. I just can't get enough.;,;.
Rebirth: The New Game of Life, This one may be listed last, but to me, the latter two books are equal in quality, though very different. Of the three I show you, this one is the only one I give the Harem Warning in... this one is Harem + OPMC, so if you don't like such things, don't read... Now this MC earns the right to most of his OP-ness though.;,;.

    _Crystal_ Search for 'Necromancer System' and be entertained...

    No need to thank me...

      _Crystal_
      As MasterRabbink said, these threads always attract shameless authors like moths to the flame haha.
      If you're new to WebNovels and haven't read much before then I recommend Coiling Dragon, I Shall Seal The Heavens, and Warlock of the Magus World.

      If you're not new then I'll just promote my own WebNovels below =p
      Uniform System is about a young man who likes to disguise himself as other people. He gets transmigrated to a world of war and magic and gains a system that helps him disguise as others. It has a heavy focus on comedy. The MC is cowardly, shameless, and a bit stupid.
      Steampunk Apocalypse! is about a apocalyptic Earth that has entered a golden age of steam technology. Mutants and nightmares cause chaos in the world. Humans can awaken as espers and gain magic powers.

      Try True Martial World. It's really good

        i'm a fan not an author but shameless enough to do it for him
        Title: The Strongest System in Dragon Ball World

        synopsis:Kalan, a big Dragon Ball fan got run over by a Truck and died when he saved a cute little white fox. Luckily for Kalan, he's the MC of our story, thus he reincarnated into the Dragon Ball World!

        Kalan's wish to be reborn as a Saiyan was granted by the Strongest System.

        https://www.webnovel.com/book/11551185905431005/The-Strongest-System-in-Dragon-Ball-World

        Really well written novel. i would highly recommend it... its so good i almost don't want to read it chapter by chapter and let it accumulate them and Bench watch them at once but i just cant wait for the next chapter I love the character's back story and development so far. And the Smooth integration into the original plot.
        it has many rare point that other DBZ novels don't have or didn't even come close to such as
        The unique plot that has never seen or explored stories
        the great character design
        and many more

          Like Master Rabbink has said, this would invite shameless author here.
          Well, let me be one of them. This is my novel:
          Flowers Bloom from Battlefield
          it's a revenge novel with female lead (sadly I create the novel far earlier before the contest, so I didn't participate). The MC live with dual identity, one is a noble girl (her real identity) and the other is a male general (yes, she is crossdressing as a male). The novel follows her as she makes schemes to get her revenge and at the same time encounter her genuine friends.
          If you're interested, you might want to try it :)

          Endless Mountains
          https://www.webnovel.com/book/11664564305472105/Endless-Mountains
          what makes it unique: Slightly older mc at around 30 he's not op but starts of significantly strong and he is not a goody two shoes or a twisted piece of human shit he's more like Linley from warlock of the magus world he would do stuff ( evil or good) as long as it benefits him
          synopsis: The Auguste Clan was one of the three Supreme clans of Yuramia. Extremely well known for their Magical talents and their Ruthlessness. This story will feature around the 3rd Son of the Auguste Clan a man who was known throughout the continent as The Sorcerer King. He wielded such power That the Gods and Devils feared him, however, every story has its beginning and this is the beginning of the Sorcerer King.

            Web Novel Novel Ask