One Piece: Seaside System - Chapter 8: Marine Based -

Shen Yuan, a normal human who was living his life peacefully on earth died mysteriously, only to get reincarnated into the world of cultivation with an unknown bloodline so powerful that it even surpassed his chest system....“Hmm, looks like becoming an alchemist might be good. System, purchase the Alchemy knowledge.”[Ding!][Congratulations Host, for acquiring Heaven Refining Alchemy Sutra.]...Follow to see the journey of how Shen Yuan creates the strongest harem since the Primordial times to journey the three thousand world.

In the tribal farming era, the world was vast and unknown. Upon continuous exploration, the people of ancient times were appalled to discover that in this world, where the sky was round and the earth was square, all sorts of miracles had befallen them. There were even figures like an ultra-big ten-thousand-foot giant, as well as huge intelligent beasts that had mysteriously appeared, trampling upon the mountains and rivers, and shattering the earth. Hundreds of years later, in such a dangerous environment, people fought against the huge beasts and finally established the glorious Sumerian civilization. On this day, a wise giant suddenly made a complete descension on earth, trampling on all the mountains and rivers, and wiping out the entire nation. The world crumbled, and city-states collapsed; had the gods descended to condemn the people?

“I’m sorry, you’re all just ants living in the orchard of my yard and you are just scrambling all over the place. If I were to accidentally pass you by, I might just accidentally trample you all to death. That’s it for you.” So first, I’ll set up a sandbox in my own yard, a base area for plotting farmland. Then, I will shepherd the human race and various worlds in my sandbox.

Gu Nianzhi had no idea how to get the aloof and handsome Major General to fall in love with her.

His eyes were dark and serious. “…Seduce me. If you can do it, I’m yours.”

Gu Nianzhi: “!!!”

- Description from Novelupdates

A powerless woman’s worst nightmare is marrying someone against her will. When those who are supposed to protect her betray her in the vilest of ways, Leonor is forced to marry a Duke known for his cold nature and repulsive appearance. After a miserable childhood, it shouldn’t have been a surprise to her that her future was never truly in her hands in the first place.Duke Desmond de Montclair was nobody before the war. He garnered the King’s favor by doing the impossible in battle. Unfortunately, any achievement is eclipsed by his appearance and unbearable personality. In a kingdom that idolizes beauty, there is no room for someone like him.At first, Leonor finds life with the Duke to be what she’s used to - walking on eggshells and never speaking what’s truly in her heart. Eventually, things slowly start to change as the Duke learns about the horrors she faced while living with her family. His power becomes the key to her revenge.However, in a moment where she feels cornered, Leonor confesses to the Duke that she’s in love with someone else. The progress she has made with the Duke comes crashing down around her.Will her magic abilities be enough to convince the Duke not to throw her out? If she can make herself useful to him, perhaps she can gain his sympathy somehow…