One Piece: I'm Destined to Be the Son-in-Law King! - Chapter 14: Roya Lets the Old-Timer Go First

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

In her past life, Michelle was an ordinary doctor who worked in a small hospital, but once in a while, a strange envelope would arrive at her apartment and she would take up a weaon and turn into a deadly assassin known for her stealthiness. But being a top assassin, Michelle had many enemies and ended up dying, only to wake up in the body of Michelle Grace, a pampered young miss in a world similar to ancient dynasties, except that cultivation existed there. Not everyone could cultivate, but Michelle Grace could.The original Michelle Grace was engaged to the Crown Prince, and he killed her before Michelle took over the body, so after making a deal with Michelle Grace's father, the Archduke, Michelle took on the name Grace and started a revenge plan on the Crown Prince, his lover, his mistress and his father, the Emperor.A bit troublesome: Michelle gained the attention of two men who together were the Dark Lord. They were horrifyingly powerful, so Michelle had to be careful around them. Luckily, they didn't have in their plans harming her, as they were intrigued by her constitution. Michelle possessed a rare blood, which they could use.

He was on his way to buy some beer to celebrate his acceptance as a civil servant when he was suddenly isekai’d by truck-kun.

“Black Myth: The Destined One” the mobile game, sent Li Ping'an back to the Journey to the West World where deities and Buddhas had perished, demons roamed freely, and the Three Realms had collapsed. The longer he survived, the stronger he became.Cultivation, Divine Skills, Side Techniques, Magical Treasures... and the like were obtained from the game and could even be taken back to the real world.Black Bear Spirit Bodhisattva, Shadowy Moon Demon Lord, Howling Celestial Dog, Hundred Eyes Demon Lord Bodhisattva, King Huang Feng Bodhisattva, Old Buddha Huang Mei... One after another, those claiming to be immortals, Bodhisattvas, and Buddha Ancestors fell beneath his staff.Only after he had acquired wealth and status in the real world through the Cultivation, Divine Skills, Side Techniques, and Magical Treasures obtained from the game, did he realize that the real world was nothing more than the Nineteenth Layer of Hell in the Journey to the West World...With an undying heart, at ease and carefree, the Destined One Li Ping'an embarked on Journey to the West once more!