My Soul card is a Reaper - Chapter 21 The Academy Starts

A recurring nightmare afflicted Khan's nights since the Second Impact. His dreams replayed the scenes of the crash of the Nak's spaceship, an alien race that the humans had defeated five hundred years ago.

Hao Yan Che is an immortal and Yuan Gun Gun is a mortal.

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

The uncanny Dao of heaven, the abnormal immortal and buddha, is it true? Is it false? Lost in confusion, Li Huowang can not distinguish.

However, it wasn’t just these that he cannot distinguish, but also himself. He’s sick. He’s very sick.

- Description from Novelupdates