Apocalypse Shelter System - Chapter 19: The Rules of City of Darkness?

A path of survival, intertwined with the doctrine of both Immortal and Martial Arts, every punch strikes true.In the chaotic world of Martial Arts, power reigns supreme. To survive, Chen Yi exhausted all of his family savings on learning martial arts, only to startlingly discover that the Broken Jade in his mind was also accumulating energy, enabling him to possess the ability to cross into the Immortal Cultivation World.The moment he crossed over, merely inhaling the spiritual energy accelerated his martial arts progression at an astonishing rate.Not to mention the dazzling array of martial methods, pill talismans, arrays, and various cultivation oddities inside, all of them significantly boosted his strength!Since then, Chen Yi, who held sway over two worlds, began his days of striving for upgrades and growth, unknowingly becoming a top-tier existence in both worlds.And later, he found even more astonishingly, that there was such a mysterious connection between these two worlds.

Wang Yi gets a key, opening a door in 2022 will lead to 1982, and opening a door in 1982 will return to 2022.

Two very different great eras appeared before him:

Abundant dietary protection, developed industrial products, miraculous medicines, and explosive information, this is 2022.

Simple folk customs, rich wild resources, scattered antiques, and treasures of the age, this is 1982.

Traveling between these two eras, Wang Yi didn’t think much of it, he just wanted to live a good life.

- Description from novelbuddy

The World of Ephesus. A vast world plagued by Breaches containing countless Beasts of Corruption. A World on the brink of ruin as the Four Human Lineages defend the last bastions of Humanity! With the power of Gem Masters standing against the Beasts of Corruption, the flames of Humanity seek to burn ever brighter. In such a world, in the Mortal Branch of the Asmodeus Bloodline, Alexander awakens a Gem Socket that others consider defective. A Variant Gem Socket. Looked down upon by those who do not understand it, this supposed defect may just be the solution that the burning embers of humanity were waiting for. Follow Alexander as he entirely warps the perception of what a Gem Master is- as he embarks on a journey to become...The Empyreal Gem Master!

Lee Jin Woo once lived a dismal life.
He lived pitifully on a day to day basis in his five-pyeon studio filled with mold.

Then, one day, he died in a sudden fire.

When he wakes up, he finds himself inside a novel.
But there’s just one issue…
He had become the novel’s villain!