Wortenia Senki (WN) - Volume 5 Chapter 18

Leon, the world's greatest special agent, dies after a questionable accidentOnly to be reincarnated into a novel he just started readingNot only did he reincarnate, but he reincarnated into one of the three grand duke familyBut as an illegitimate child, a bastardBut so what? If the world calls him a bastard, he'll just be one***Hey so if you are reading this, I am writing this novel for my own satisfaction, so I can't guarantee a good read, nor can I guarantee consistent upload schedules, I'll be posting and doing whatever I want, but yeah hope you stay and read :)

A decade ago, the first dungeon gates appeared, but some vanished before they were ever conquered. The MC, a low-rank hunter, awakens the Lost Gate System, granting him access to these forgotten dungeons where legendary monsters and artifacts are trapped. Each completed lost gate grants him absurd power, but also reveals terrifying truths—these dungeons are prisons for ancient beings who want revenge.

Mesmerizing female moonlight priest, a beauty of the darkness who captivates the soul of others… They all flood to his side!

With the revival of spiritual energy and the breakdown of the order of species, it is a difficult test whether human beings can still stand at the top of the biological chain.

(There is already an old book, The Strongest Descends in the City, you can read it.)

- Description from novelbuddy