You don't want your secret to be revealed by others, right? - Chapter 453 - 43, Demon God Reincarnation

Fang Ze traveled to the world of psychic forensics and activated the detection system.

Since then, the world has gained a crime-solving wizard. In just one year, Fang Ze became the captain of the police force.

Suspicious disappearance cases, corpse dismemberment cases without clues, heinous vampire cases…

With his keen judgment, Fang Ze relied on the assistance of the system to grow all the way.

With the passage of time, Fang Ze suddenly discovered that this world seems to be more than just a psychic forensic doctor…

- Description from novelbuddy

It begins on the mountain.

With the glint of a knife, a flash of steel in the hands of a sworn brother. A betrayal.

Stabbed and pushed down the mountain, Zi Chen lied within the red-stained snow, left to die.

This is where it begins; he is given life by lightning,
baptized by thunder.

Those who had once betrayed him should all suffer in his cruel revenge.

- Description from Novelupdates

A ritual gone wrong gave him the world's deadliest Class—now all he wants is blood.Zeth stole the most powerful ritual magic in the world from a mad cultist. A Class that's fueled by the blood of his enemies and human sacrifice. One that's illegal to use, punishable by gruesome death. And now that he has it, he's faced with a choice: hide away for the rest of his life from those who would hunt him down, or embrace the power, becoming the hunter to get revenge on the murderer that stole his friends' lives.For Zeth, that's no choice at all.His enemies have to die. And he plans to use every drop of blood, eldritch ritual, and demonic summoning he can to kill them.

[Warning: This thing contains a bit too much bloodshed... so...]yes u saw the tags right, this is a mix of cultivation and tower so expect both the magic and cultivation in this.Villainous MC with a Personal system? if thats what u were looking for, you already got it!check the book out.-----Ye Tian was once just an ordinary human from Earth, living a mundane life. But fate had other plans for him.He was mysteriously transmigrated into the world of cultivation, a place where strength reigned supreme and power could shape reality. In this world, Ye Tian embarked on a dark path... the path of demons.After trillions of years of cultivation, he ascended to the pinnacle of power, becoming the Absolute Demon, feared and revered across the entire cosmos.His beauty was angelic, but beneath that flawless appearance lay the heart of a ruthless killer... a demon hidden in the guise of an angel.Countless races trembled at his name. He was a cold-blooded, merciless force of destruction, known for slaughtering without hesitation.Entire worlds were laid to waste at his feet. His cruelty knew no bounds, and his reign of terror spanned eons. Yet, for all his strength and dominance, there was no satisfaction.Ye Tian grew weary of the endless killing and ruling. Standing at the top, alone and bored, life had become empty... a never-ending cycle of bloodshed that no longer stirred his emotions.But everything changed one fateful day.In the blink of an eye, Ye Tian found himself back in his old body, back on Earth, as if the trillions of years he had spent cultivating were nothing more than a distant dream. However, this Earth was not the one he remembered. The world had changed.A giant Tower had appeared... like something out of the fictional fantasy stories he had read in his past life.And just as Ye Tian began to grasp this new world, a system window appeared before him...[Connecting to the Tower.]*****