Hero? I've Long Stopped Being One - Volume 1 Chapter 8

Han Yoona, reincarnated into the novel 'The Golden Heir' as the heroine of the novel and she lived her new life without complaints… until she’s killed.Her story should have ended there, but Yoona’s soul wakes up in the body of Luzia de Cazadores, the daughter of the kingdom’s most feared villain, Duke Ramiro de Cazadores.Yoona expects a cold, calculating tyrant. What she gets instead is something entirely different.“The author left out crucial details. Too many.” Yoona thinks, trying to figure out how he became the feared villain of the kingdom.As she gets to know Ramiro, she begins to realize that everything she thought she knew about Ramiro might not have been the full story.“Alright then, forget the plot or trying to rewrite everything. I’ll just grant the original Luzia's wish…”But with rival nobles plotting against them and the kingdom still fearing Ramiro’s so-called villainy, To protect her new family and escape the traps of a story she thought she knew, Yoona must outwit it to prevent the original story's outcome.

Transform into Divine Dragon and dominate the world!
He is the only Divine Dragon in the sea who founded an underwater Dragon Palace.
With Crawfish Soldiers and Crab Generals as his followers, wild sharks and gigantic octopuses as his subordinates, he is the dragon that rules the city.

- Description from Novelupdates

Renji Kurozawa was just another nobody—until he died and was reincarnated in a world of swords and magic. Summoned alongside other “Chosen Heroes,” he hoped for a second chance at life.But his gift was different. “Death Claim”—the power to steal abilities from those he kills.Betrayed by his allies and left for dead, Renji embraces his dark power. With every enemy he slays, he grows stronger, turning from a forgotten outcast into the most feared force in the kingdom.Now, hunted as a villain and pursued by gods, Renji must carve his own path—one kill at a time.If fate wants a monster, he’ll give them one.

Ding Ning was just an ordinary youngster from a small border town in southwest China, but he had learned tremendous medical skills from his masters since his childhood. After graduating from college, he stayed in Ninghai City and tried to seek a job in a hospital there, but things did not go well at first. However, he accidentally saved Shen Muqing who was from a rich and powerful family, and then got involved in the confrontation between Ninghai special police team and a mysterious organization called Vampire Mercenary Group in order to protect Ling Yun who was his landlord’s daughter. It became the turning point of his life. After that, he started an incredible adventure during which he would find out the real identities of his father and masters and discover the secrets behind the mysterious organization Vampire Mercenary Group and the special weapons and tactics team Dragon Soul…The story tells about how he opened nine apertures, fought with rogues, chased after various pretty girls and established a rich and powerful family by himself. He climbed up to the peak of his life step by step, and finally became medical sovereign.