The Monster King's Legacy - Chapter 18: I Might Not Survive

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

In the first reincarnation of Earth, the immortals vanished.In the second reincarnation of Earth, the dragon race disappeared.In the third reincarnation of Earth, mankind faced despair.Living in the third reincarnation of Earth, Ding Huan does not want to die.

After being awakened by a raging headache and faint memories of his past life, Tsubakihara Yuuji found a strange smartphone he had never seen before.Opening it, he found a single question that would change his life and many others for the better, forever.[Do you wish to join the Multiverse Group Chat?][Yes] / [No]

On the day his parents died, Aleric was cursed and became hated by all.His flesh took on the pallor of the undead, marking him as a monster in the eyes of the living. From that day, Aleric was forced to survive alone in the world that despised him.Everything changed when he uncovered an ancient necromancer’s crypt and a staff that promised him the knowledge of Dark magic and uncovered what the curse truly was.Aleric was a death-touched–a person to whom all Dark magic was as natural as breathing! He learned in days spells that took years to others.Dark magic had long been branded evil. The kingdom of Dark mages was destroyed and its people killed. To accept this power was to become hunted as well... But to the world, Aleric was already a villain.So he chose to become not just a villain, but one so powerful that not even the entire world couldn’t bring him down! He will build a kingdom that will stand eternal, and every killed foe would join his undead legions!The nations of the living shook in fear. The age of the living was ending, and the armies of the Supreme Necromancer were going to reshape the world.