The Guardians' Throne - The First Magic Swordsman - Chapter 8 - Friends

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

He is an undead who is devoid of all humanity, he is the one and only supreme overlord, he is a man who has severe mysophobia.

“Marry me, and you might not live to regret it.”Everyone in the city knew about him—a ruthless tycoon with a dark reputation. Whispers said he was cursed, having outlived four fiancées, each meeting a tragic end. When she became the fifth, forced by her own father to take her sister’s place in the marriage, the city waited for the inevitable. They were certain her body would be carried out of his mansion within a month.But to everyone’s shock, not only did she survive—she thrived. From a pawn in a deadly game, she rose to become the most formidable woman in the city, turning the tables on fate and rewriting her destiny.

You emphasized harmony your whole life and this is how you go…!’ The successor of the Spear Master Sect and his apprentice Hyuk Woon Seong were framed of learning a forbidden Demonic art and slayed.

A helpless and pitiful death by the hypocrites of the Orthodox sect.

The moment Woon Seong faced his death, the artifact of the Spear Master Sect emitted light and gave him a new life.

The life as Number 900, a trainee of the Demonic Cult!

The two identities, the Orthodox Sect and the Demonic Cult.

But his objective is one. Vengeance! Accepting his destiny and remembering his grudge, Woon Seong trains in martial arts and his time of revenge slowly comes closer….

Take over the Demonic Cult and punish the hypocrites of the Orthodox Sect! The revenge story of Number 900, Woon Seong growing in tasks of life and death.