Bad Born Blood - Chapter 15

A former sporting rifle shooter genius transforms into the ‘Juvenile Butcher’. While originally supposed to have received the death penalty, he was instead fortunate enough to have entered a secret and highly regarded armed force, throwing himself into the ‘Nirvana Project’.

After a period of 10 years, he now has time to freely recover. Having trained until he had excellent military and martial skill, he sweeps through various military districts and returns back to his hometown. Under the monitoring of a beautiful female cop, he re-establishes his family’s bodyguard service, protecting beauties and moving unhindered, his achievements causing the fame of his outstanding, god-level bodyguard service to resound across the world!

- Description from Novelupdates

Liam who was born from a once prestigious household was found out to be a genuis of magic, genuis that appeared only once in a minnelium but as he reached the age of awakening the system it was found out that he was no different than a normal human although he had legendary skills they all appeared to be locked.Now living with his single mother who was struggling financially Liam could not bear to see his beloved mother in such a state.One day while on his way to town he mistakingly entered a dungeon and that marked the beginning of his new life...

I was some twenty-something woman dying of stage four cancer.I got obliterated by the “Truck-kun” you nerds are always joking about. Turns out it's a lot less funny when it's your guts splattered on the pavement. Crap.Next thing I know, I'm floating in the dark and this thing pops up in my face.[A choice is now available to you.][Option One: Fade.Cease to exist.][Option Two: Reforge.Begin anew.]You think you can just erase me? Hah. As if.Fueled by pure, uncut spite, I slammed the reforge button. Turns out the universe has a totally sick sense of humor, though.I woke up as a male elf. A seriously hot elf —a mage, of all things. Let's just say I was working with some… unfamiliar hardware downstairs.And Jonny? My best friend, my bro, my lifelong meat shield? The universe decided he'd look better as Yael—a stunningly beautiful elf chick with a charisma stat that was probably maxed out.For a while, we weren't just getting by. We were crushing it. It was awesome.Our new life was shattered by the arrival of Vex, an overpowered demigod who saw our world as a resource to be harvested. He was a cosmic-level threat.My pride, the same stupid pride that always gets me into trouble, wouldn't let me kneel. So I told him where he could stick it.Big mistake.The price for my big mouth was paid in her blood. Vex decided to make an example of her. He didn't just defeat her; he shattered her legs into pulp right in front of me.After that, she just… erased me. Walled me off. I went from being her best friend to a ghost she looks right through. Her hatred isn’t loud; it's a permanent debuff, and the silence is a thousand times worse than her screaming would have been.Broken by my failure and rage, the System offered me another choice.I accepted. The System laid out the cost in cold, hard code:The friendly blue “Overwhelming Pride” interface shattered, overwritten by a brutal, blood-red OS running one program: The 'Overlord Slayer'. My personality was stripped for parts. My charm and pride were forged into an 'Aura of Dread.' My guilt became a damage buff called 'Pain Eater.' My grief is now, literally, my mana pool.My quest is no longer about survival. It is brutally simple: Kill Vex. Absorb his power. Fix what I broke.But to become strong enough, I have to grind this new 'Slayer' class, and every level up feels like I'm deleting a piece of myself.The real question is, by the time I'm strong enough to squash him, will there be anything left of the person Yael knew?And even if I can fix her legs… what's she going to think of the monster who comes back?

The main character Lei Yu does not have the ability to practice his family’s martial arts. He gets stepped on and tossed around. Due to certain reasons, he leaves the family, coincidentally gains an ability, and makes his own path to becoming an immortal.