MTL - North American Detective: I Am Proficient In All Kinds of American IAI - Chapter 221 reason

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

Just as nuclear weapons are only a byproduct of scientific exploration, immortality is merely a small gift along the path of seeking the Dao. The New Dao Master, Grand Wise Teacher, and the strongest cultivator in millennia, Real Person Zheng Fa, is recruiting a personal disciple. The reference materials for applicants are as follows:Topology in Talismans: Starting with the Little Rain TalismanResearch on Artificial Intelligence in Magical Tools: A Preliminary Exploration of Tool SpiritsElemental Decomposition of the Nine-turn Golden PillBasic Pathways of FormationNote: Priority will be given to those who have published papers in the Immortal Dao journal.

Just like how everyone adored heroes in their childhood, a certain young man adored those powers hidden in shadows. After hiding his strength and living the mediocre life of a mob character by day while undergoing frenzied training by night, he finally reincarnates into a different world and gains ultimate power. The young man who is only playing at being a power in the shadows, his misunderstanding subordinates, and a giant organization in the shadows that gets trampled…. This is the story of a young boy who had adored powers in shadows possibly eventually reigning over the world of shadows in another world.

Levi, a young man who spent over a thousand years in a cultivation world, awakens in a hospital only to discover that two years have passed on Earth. The world he left behind has completely changed—mysterious spiritual energy has appeared, transforming Earth into a cultivation world filled with monsters, undead cultivators, and mysterious places like floating islands.Though Levi is furious that the entity who transported him to the other world failed to stop time on Earth as promised, he must now face the new reality. In a world now filled with cultivators, interdimensional conflicts, and the presence of a cultivation leveling system, Levi struggles to adjust to his weakened human body while seeking to uncover what happened to his mysteriously missing family.