MTL - Magic Tower Starry Sky - Chapter 1449 Messenger of justice

Returning to the Mysterious Era features a boy who can time-travel back to the past using old relics. The twist? He’s stuck in the body of the relic’s owner.After a near-death experience, Cassius unlocks his ability to travel to the past in the body of Li Wei, a member of the Wind Elephant Sect. Li Wei was a coward who lived a life of regrets up until the day the entire Wind Elephant Sect was mu*dered. As Cassius relives Li Wei’s past, he makes different decisions to show Li Wei a different kind of future.By living out the ups and downs of Li Wei’s life, Cassius is introduced to the world of Covert Martial Arts, ties that run closer than blood, and supernatural forces. Crossing the line between the ordinary and supernatural, he realizes there’s no way back. New friends and enemies slowly integrate into his reality.Now, he must uncover the secrets of Covert Martial Arts and get stronger to survive.

Lumberling, a 42-year-old civil engineer, grew numb to the monotonous rhythm of modern life. Hoping to rekindle his sense of wonder, he set out on a solitary nature trip, only to stumble upon an ancient, forgotten pyramid. A strange red light burst forth, killing him instantly… and binding itself to his soul.Cast adrift in the void, his soul found no rest, until he awoke in the body of a young foot soldier, bleeding and broken on a war-torn battlefield in a world not his own.Determined not to die again, Lumberling fights to survive in this brutal new realm where knights clash with monsters, kingdoms rise and fall, and mysterious powers shape the fate of nations.Armed with a strange ability to devour the essence of those he slays, he begins to carve out a new path, one forged by blood, strength, and sheer will.But power alone may not be enough. In a world where danger lurks in every shadow, and ancient forces stir in the dark, can a lost soul rise above fate… or will he be consumed by the very essence he seeks to control?

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.

99 is one, and nine refinements are returned to Xian.

A young town boy, stepping on Xiuxian Road, is not a family, no gold fingers, with his own determination and wisdom, the nine major cultivation system, the nine realms step by step to the peak, and finally ninety-nine one, the achievement of true immortal.

- Description from Uukanshu translation