I Possessed a Demon Sovereign - Chapter 682 - : 680. Plague (1)

The world I transmigrated into was a dark fantasy game universe, devoid of hope or dreams.Doesn’t feel like it at all, though.

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

Mirian Castrella, a student in her final year of a magical academy, unexpectedly finds herself caught in a time loop and haunted by strange dreams of the Elder Gods. Her plan had been to become an artificer to support her struggling family, but when the Akana Praediar army betrays her country in a surprise attack, everything changes. Instead, she finds herself delving into the dark secrets of the world, mastering magic, finding allies, and uncovering a vast conspiracy. However, just because the time loop can save her life doesn’t mean it can save her from everything. Mirian must navigate a dangerous world changed by the magitech revolution. Her quest to save the world from the apocalypse will lead her to battle magi and beasts, into the unfathomable underground Labyrinth, across distant lands, and into forgotten ancient ruins. Only through becoming a master arcanist who understands the true nature of the world can Mirian hope to stop the apocalypse she relives through time and time again. If she fails, everything she loves will be lost. ‍ What to expect: - Slow burn power progression - A clever protagonist who changes as the story moves from arc to arc - Expansive world-building full of complexity and secrets - A focus on magic - Intrigue and spell-flinging fights - A rotating cast of characters in each arc - Starts slow, then picks up speed

Feng Yun was an ordinary young man who was unable to cultivate. One day, He got the inheritance of the Ancient Yang Demon Clan and a mysterious sword. With these he became a super genius and started his new journey from a small town to heaven, sweeping across the world, vying for the supreme existence.