Marked by the Heartless Alpha

Not sure the description and the actual story match. From what I know MC is an orphan who died and reincarnated into a world that reincarnates people. If you successfully reincarnate you can go back to this world and be rich and stuff like that.⚠️ This, I’m about to type may or may not be spoilers, it depends on the type of person you are so proceed with caution! But you can teleport yourself to the end when I so very nicely explain how different it is from the description  ⚠️——————————MC - Transmigrated Into Lin Qi a smart top student in this reincarnation world. When he transmigrates, he’s standing in front of the reincarnation tower getting ready to be reincarnated, while it’s happening, some dog blood drama happens an enemy shows up and a possible FL also shows up, yadda yadda, so he finally gets inside the reincarnation tube THEN obtained the system and gets reincarnated. The world he’s reincarnated to is just like ours now, but it has some ancient martial arts, the mystical martial arts, all that jazz.MC, reincarnates into someone that looks like him, but has a sad life, he asks the system what it can do, the system said it can upgrade him to the top most level, and we figure out later at the cost of lifespan. So the MC finds ways to learn martial art and succeeded, gained an cultivation manual made a big scene and levelled up to Land Immortal, and immediately went to get revenge, after.He finds the FL and Villain, they all have the same destination, or whatever, MC gets back at the Villain and helps FL or whatever and keeps pondering if there is anything after land immortal and wants to stay invincible. Basically a whole short story, the author could realistically cut it off around her, anyway this is all happens in 22 chapters and I’m as far as that….—————————Momentarily, when im into stories I like going back to read the description, so I did that for this one, and seen it’s so much different from what I was reading.What world of immortal, what demons, what ancient gods, what sects, what doesn’t have any cultivation talent and is about to die but then obtains a system. Nothing like that happens where I am so for, and I feel it won’t happen later either, and it wouldn’t make sense to unless the MC lost all memories.The system did not awaken as he was about to die of old age, it awakens when he’s in a reincarnation tube, about to get reincarnated.If you came because you thought the description sounded cool, then try something else, unless you feel what I described up top is cool then continue reading. I will update if I see it changes to how the description describes it to be.

I hope an admin sees this but there's some stuff missing from chapter number 11 in this book

Really good story. I especially love Emilia's character. She's a boss lady. Much love author

Found it just occasionally while searching for the Record Of Ragnarok manga :)  

But ironically, I loved it even more than Records, ahah!  

It's hard to explain why I enjoyed this manga so much... The story is pretty cliché, as are the character types. However, there's definitely something special about the characters.  

The art style isn't outstanding, but it's very decent. This manga isn't a masterpiece, but it somehow touched me.  

Give the first chapter a try; maybe you'll get hooked like I did :D  

PS: I'm forced to write a longer review, so I'm adding more text here. There's really not much else to say about this manga—it's only 21 chapters and won't be continued. But, in my opinion, that's actually better since the story wasn't strong enough to carry on. Sometimes it's better to keep things simple, ahah!

Sorry for my English, first of all.  

Summe up:  
The story was initially called Ragnarok but underwent a change to "Sword of the Dark Ones." If you're looking for a great battle manga with a solid and concise background story, along with some body exposure, blood, love, revenge, and hate, this is it.  

Story: 8  
Leroy is the main character in a world dominated by "Dark Ones." These monstrous creatures devour everything in their path and are incredibly powerful. Leroy, a standout mercenary, catches the attention of an underground guild, and a mysterious girl named Lena appears, offering him a peculiar job tied to that guild—this is how the story begins to unfold. While the plot may seem straightforward at first, it becomes increasingly complex as you progress. It's a very short series, but after reading it online, I felt compelled to buy it due to its sheer awesomeness.  

Art: 9  
The art is highly refined for its time. Details stand out as a strong point of this manga, along with impressive textures and skillful use of black ink tones. The characters are visually appealing and exude mystery as you uncover their pasts and experiences.  

Characters: 8  
Honestly, I like them all, especially the young girl. Things aren't always what they appear to be at first glance. However, revealing examples here would spoil the fun! Trust me, it's incredibly impressive—even the sword that can talk and materialize adds depth.  

Enjoyment / Overall: 9 or 10  
I thoroughly enjoyed how a simple and fast-paced story like this could leave such satisfaction and a craving for more. Each chapter grows increasingly engaging, and the uncensored elements enhance the enjoyment significantly. I particularly savored every chapter, page, tone, and detail!  

PS: I'd love to see an anime OVA adaptation of this series someday.

Amazing, I was so addicted I had to go through Galatea, Inkitt and good novel for the whole thing!!!!