World Development System - Chapter 290

When necromancers perform a great ritual to summon an undead servant, they bring a powerful vampire into their world. And now, their fate is sealed as food, but for Klaus, this is just the beginning of his adventure. In a cruel world where people will do anything for power and immortality, he is already very strong and immortal, so what's left if not start a family and have fun stepping on arrogant people through the way?

Tan Shuchang had always considered himself born into a scholarly family and had also been a young star atop the honor roll, a true parasite of the upper class. He should have been holding significant local authority, receiving endless gifts, spending boundless money, enjoying innumerable years, and marrying countless concubines. How had he ended up becoming a demonic cultivator? After pondering for a long time and still not understanding, he slowly emerged from the pool of blood, deciding to think it over gradually…

The days where adventurers would roam the land and grow strong are long gone. More than 99.9% of the world's population is level 1, and in fact, leveling just isn't something people think about anymore, as almost every spawn point on the planet has been gone for close to a thousand years. Only the elites, the super rich, or the super lucky have access to spawn points, and because of this, they are like Gods among men: like superheroes. For people like Zach, life is a mundane, ordinary experience of getting up, going to school, working, and then going back to bed. But that's all about to change when he stumbles upon one of the only unknown spawn points in existence. And in doing so, his life is about to descend into a wild chaos he never could have expected. (Lit RPG, fantasy, action, slow burn)

Crossing to One Piece world, he became Roger’s younger brother.