City of Sin (Yanyu Jiangnan) - Vol 1 Chapter 15: Rune Armour

After opening the ancient well in his backyard, Li Yin’s life has changed since then!

Sixth Prince Li Yin? 21st century otaku Li Yin? He can travel freely between the two worlds, what kind of life should he choose?

Harem? Hegemony? trickery? Is that all?

No! With the advantages of modern technology, he wants to build his fiefdom into the economic center of the world, and the world map will be filled with his colonies…

PS: This is written about the Tang Dynasty, but it is a parallel time and space. There is no need for historical burdens, and it will be a little different from the real Tang Dynasty. Please don’t be serious about the textual research party, because some small details like titles are annoying. This is not what I wanted, thank you!

- Description from novelbuddy

Lin Jiufeng transmigrates to become the Yuhua God Dynasty’s Crown Prince but is dethroned, banished to the Cold Palace, and imprisoned there because he had released the holy maiden of their rival country.

Lin Jiufeng isn’t dejected. He has brought a sign-in system with him when he transmigrated and he would receive rewards when he signs in at different places.

Before the Cold Palace’s gates, he signs in and receives the Ultimate Heaven Slashing Sword Skill!

In the Great Council Hall, he signs in and receives the Heaven Patching Technique!

In the Empress Dowager’s palace, he signs in and receives the God of War Totem!

…

Liu Jiufeng imagines that he can quietly sign in like this until he becomes invincible. Yet who would have imagined that the Heavenly Concubine whom he secretly released would rise in rebellion and seize power after she returns to her country?

After she succeeds, her first priority is to attack the Yuhua God Dynasty to rescue Lin Jiufeng.

When Liu Jiufeng hears of this news, he’s puzzled. «Do I need you to rescue me?»

"In this world, morality is but a thin line away from depravity, and the most captivating tales are often shrouded behind the veil of insanity."
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I was just an ordinary guy, living a dull and unremarkable life as an editor.

But when a maniac author killed me for rejecting his novel in a writing competition, I reopened my eyes in a modern fantasy world.

"Hmm? Wait, this world…."

But fate, being a prude little bitch, played a twisted joke on me.

I reincarnated into the very same novel that I rejected for the competition award, written by the very same author who killed me for it.

Not only that, but I transmigrated into the body of a disowned noble named Lucas Morningstar.

Lucas was a minor antagonist in a novel who served as a stepping stone for the protagonist and their allies.

Arghh….

Of all the people, I just had to be reborn as someone who was despised by the main characters the most at this point in the story?

B-But hey, with my knowledge of the future and understanding of the main characters, I can at least live an easy life!

Right...?

"Yeah, I can work with this!"

Or so I thought until I remembered the ending arcs of the book.

This world is destined for doom!

And not so long after, I started to realize that the novel and the world I transmigrated into might not be as similar as I had originally thought….

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[Disclaimer: Caution while reading is advised. Tighten your seatbelts and brace yourself for a bumpy rollercoaster-like journey. Don't blame the Author if you fall from your seat while reading a plot twist. Thank you.]
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AN: MC is NOT a villain, so don't expect one.

*The MC will seem a little bit (ok let's be honest, more than a little bit) foolish in the first 30-35 chaps but don't be fooled. I ask you to read till first 50 chaps before deciding to trash-talk the MC because that's where his borderline psychopathic strategist personality starts to surface.

"Locke transmigrated into an era where everyone had Battle Beasts. Daemons were rampant and humans were forced to build walls around their dwellings while depending on Beastmasters to keep those monsters at bay.