Can you recommend an underworld novel where the protagonist is invincible?

Keeley, a simple plain Jane, hits the jackpot. [No, she did not win the lottery!] At least that's what she thinks when she marries the most eligible bachelor in New York City: Aaron, a wealthy cold-hearted heartthrob and Tycoon. She wants to show the world that she deserves her position and bends over backward to fit into his world. One beautiful day, Aaron hands her a document asking her to sign. A divorce paper... "She's pregnant, and I need to take responsibility." That is the last thing that keeps on playing in her mind before she takes her last breath. Keeley dies, a 'hit and run'. [End of story. Not!] For some unexplainable reason, she wakes up as her younger self. A young high school girl, around the time when she first meets her cheating husband. Remembering her life with Aaron before she died, she makes a promise to herself that she will do everything in her power to avoid him at all costs. Will she be able to keep her promise when Aaron has his own plans as well, specifically for her? Or will she repeat history and fall for him once more... Why not journey with me and find out the truth behind their story. *Cover art by polkadottedscrunchie*

Sherlock is a new generation Dungeon Lord whose ambition is to become the greatest Devil King and building up the greatest Dungeon in the Underworld. He summons a group of other-worldly goblins who give themselves strange names, form cliques, engage in commerce, and even fight among themselves. They call themselves—Gamers!

"I lost you once in the past but never again even if it means summoning hell on earth!" —-- She was his first love in a world filled with strangers. He wanted forever but fate played its game and she disappeared into thin air. After five years of longing, they met again but she doesn't remember him.  What he didn't was her horrible past that was kept hidden from the world. What will happen when he finds out? Will it ruin his dream to be together with her?  "Little kitty, we are meeting again. Looks like you and I are fated." Michael talked to himself with an evil smirk.  **** Cover is not mine, credit goes to the original artist. Author's contact info- Insta- wabi.sabi_1083 discord- Celestial Creature#2358 Server- https://discord.gg/VatREPdxcj

A man that doesn't know his past, except for specific memories, was suddenly throwed on a weird but familiar world, in a dangerous situation. And now he has to survive in this world without any guidance but a system that came out of nowhere. Read the Tags. I placed a lot of Tags that has mature content as this novel will be full of spicy lemons. But, of course, it will have plot as writing too much lemons is mind tiring. Have a good time reading it. Also, if you see mistakes at the beginning, don't worry, it becomes better as you read. If you understand me.( ͡° ͜ʖ ͡°) All the rights of the works I may use as reference are from the respective Authors, with the exception of my OCs. Also English is my third language, so forgive me if you see many mistakes or chronological errors.

The Mc is reincarnated in The movie Underworld with 3 wishes. This more of a wish-fulfillment story and English is not my first language also my grammar sucks also those who want something original skip this fanfic.

It sucks that of the two Invincible Self Insert fanfictions I have found, neither reliably updates. So here I am to fix that by bringing the world an Invincible Self Insert fanfiction by an author with a proven track record of reliable updates, finished stories, and the full capacity to play with the plot however I want without twisting the traits and tone of the characters. So strap in for a good time. Fair warning, the SCI-FI will be harder than what is seen in the comics and TV show and some of the plot conveniences that get thrown out as soon as they are introduced are gone. Props to LordValmar for the cover image Massive props to SeekingRaven for funding this story. U da best, Dawg.