Valerian, The Legendary - Chapter 251 - 251 Shiba.

After his death, Bern awakens 10 years into the past as the third prince of Kailis, the enemy country.

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

Welcome to Freia. A continent where evil magi ruled. Until firearms came, that is. Now the people live free of those demons…

More, however, must lurk beneath the surface.

Claude, a transmigrator from another world, finds himself in the midst of this changing world, attending ‘middle school’. Or, as he calls it, ‘boot camp’. His destiny was to graduate and join the military, but the future is seldom so simple.

His life, and the world, is set on the path of upheaval and chaos the day he finds a cookbook.

A magical cookbook.

- Description from novelupdates

[Hot follow-up] Basic functions of the invincible plug-in version 1.0: offline training, perfect battle, and exploration. Advanced functions: artifact store, stealth, double strike, acceleration… High-end functions: teleportation, energy shield, clone… Super functions: independent space, infinite clone, time suspension, infinite blue, attribute modification, forced slavery… Metamorphosis function: infinite resurrection, rewind time, invincibility, spike, copy… Super metamorphosis function: second day, second, second air! Seize the universe!

More powerful functions, please look forward to the plug-in version 2.0.

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- Description from novelbuddy