Online Game: I Can Use Ultimate Skills Infinitely - Chapter 40: The Seven Guardians From 10,000 Years Ago

Ning Yechen used to be the Demon Lord. He singlehandedly took over the Demon Realm and attacked the Heavenly Realm. His name preceded him throughout the Six Realms. He got tired of fighting, so he quietly went into seclusion and became a happy hermit.One night, an Empress from the Heavenly Realm fell into the Mortal Realm after someone drugged her with an aphrodisiac. She inadvertently fell into his room, and they made out. After the deed, the Empress quietly left. Just when he thought he would never see her again, she showed up in front of him ten years later, bringing a child, saying it was his daughter and demanding accountability from him! “She’s your daughter. You have to be responsible for us!” Ning Yechen was stunned!

When Cheng Qianfan opens his eyes every day, the first reaction in his mind is: What is my identity today (which vest should I wear)?

This book is also known as “Ace Agent: My Vests Are Countless”.

The red ‘flame’ hidden deep inside the enemy, the agile and outstanding member of the red team ‘Chen Zhou’, the favorite general of the military commander Dai Chunfeng, the blue bird… and so on.

However, he knew that he was Cheng Qianfan, a staunch red warrior!

“In the dark, you firmly watch the sun in your heart; in the long night, you silently give birth to the dawn of dawn; in the tiger’s den, you bear the burden of humiliation and wait for the time; in the battle, you rise quietly, killing the enemy invisible; no one knows your name , your feats will be immortal…”

His story begins in the early spring of 1936…

- Description from novelbuddy

When Kael died, he thought it was the end.Instead, he woke up in the body of Kaelion Drenlor—the disgraced heir to a powerful duchy in a kingdom on the verge of collapse.In this cruel and mystical world ruled by bloodlines, magic, and ancient deities, Kael isn't interested in playing the hero.Not when being a villain gets things done faster.Cunning, cold, and dangerously ambitious, Kael begins his rise from the shadows.He doesn't shy away from blood or betrayal—and he certainly doesn’t mind bending hearts to his will.As power gathers around him, so do those drawn by obsession, loyalty… and desire.But even as his influence grows, he keeps his true face hidden. Behind the mask of a second identity, he handles the dirty work the noble Kaelion could never touch.In the darkest corners of the realm, he plants the seeds of something greater: a secret organization—The Order of the Black Sigil.Built to manipulate, infiltrate, and control, it becomes a force whispered about in fear.But as Kael pulls strings from behind the scenes, the world begins to see him as more than just a shadowy lord. They begin to worship him.And gods, even fake ones, are dangerous.In a world of schemes, monsters, and ancient mysteries, Kael never asked to be a savior. But one step at a time, through love, lies, and war—he carves his throne from the bones of empires.In the end, only one will sit upon the world.###Before you dive in, here are some things you should know to better enjoy the story:1. The MC is not an all-knowing monster from Chapter 1Our main character is a teenager who transmigrated into a dangerous world. He’s not some ancient cultivator with 500 years of experience. At the start, he’s a bit unhinged (he kills someone in Chapter 1), but still grounded—more of an antihero than a villain.But this is a journey of corruption. As he faces the horrors of this world and gains power, his mindset begins to change—slowly, and then completely. By the time you're deep into the story, he’ll become the kind of villain others whisper about in fear.So no, he’s not your overpowered righteous MC. He’s dangerous, ambitious, and eventually terrifying.2. Yes, there’s romance—but NO, this is not a fast food haremLet’s be real:Day 1: Meet Girl ADay 2: Sleep with Girl ADay 3: Onto Girl BThat’s not happening here.This novel values slow burn, proper development, and emotional payoff. The MC does have multiple love interests, but every relationship is earned. Each girl has depth, motivations, and unique interactions with Kael. No one’s here just for fanservice. And yes—they each get proper screen time.If you’re here for emotional stakes, chemistry, and realistic progression: this one’s for you.3. The worldbuilding is deep and rich.High fantasy. Secret cults. Ancient orders. Political schemes. Forgotten islands. Brutal wars. It’s a lore-heavy universe built to explore.4. The power system is risky and unique.Getting stronger can literally drive you mad. But don’t worry—our MC finds ways to survive (and thrive).Also, each continent has its own power rules—some based on bloodlines, others on potions, rituals, spells or forbidden arts. So expect variety.5. Lots of action and crazy fights.From intense duels to massive battles, this story brings the chaos.6. Side characters matter.No “zombie” side characters here.They have their own stories, motives, and growth. They're not just props for the MC. Some might even surprise you.7. Yes, there are other transmigrators and regressors.But they appear later in the story—and when they do, things get wild.