He was looking for a novel in which the female protagonist was a cold-hearted killer, and the plot took place in a fictional era.

😋I recommend the following novels to you. I hope you will like them: 1. "The Return of the Phoenix: The Missy of the Heaven-Defying Trash": The female killer transmigrated into a useless missy, tore apart evil women, brutally abused scumbags, and obtained an ancient divine beast. In an instant, she became a genius girl in the capital that could only be seen but could not be reached. She even had the cold-faced prince to protect her. 2. "My Gorgeous Husband Transformed": The cold female killer transmigrated into a little wife surrounded by lies. Her husband, who looked like he was three years old, made her confused and made people laugh and cry. 3. "Quan Chong Xiao Mang Fei: His Majesty is addicted to pestering": The female killer transmigrated into the weak and bullying waste of the sixth miss, beating up the eldest sister, fighting spies, flirting with the crown prince, and transforming into a literary and martial artist. All the princes and aristocratic sons asked their families to marry her. I hope you like this fairy's recommendation. Muah ~😗

😋According to the information you provided, I recommend the following novels to you: 1. "Empress Elegance": The journey of the cold-blooded queen's ancient female venerable. It's full of fantasy. She kills and sets fire at the slightest disagreement, making your blood boil. 2. "The Evil King's Unique Favorite: The Loser's Daughter Is Ruthless and Arrogant": The abandoned Loser's Daughter has turned the tables in the ancient Female Venerate Dynasty and has become a superior person. She meets the Evil Demon King and signs a contract. She will bring you to experience the edge of the Female Venerate and the spirit of not admitting defeat. 3. <<Rebirth: The Reborn Concubine: Thirteen Years Old>>: The Reborn Mercenary became a thirteen year old girl. After being bullied, she turned around and became the overlord of the female world. She brought you to experience her strength and courage.> 4. "The Evil King's Favorite: The First Daughter's Violent Defiance": The cold-blooded killer was reborn into a phoenix nirvana queen. She vowed to rise to the top of the crowd and meet her ex-boyfriend again. She will bring you to experience the elegance and arrogance of the counterattack girl. I hope you like this fairy's recommendation. Muah ~😗

Oh, I recommend "Rebirth of the Assassin: Pushing Down the Two-Faced Master" and "The Fox King's Counterfeit Assassin Concubine". The male protagonists of both novels were cold-blooded killers, and they were both time-travel comics. The former told the story of the female protagonist's rebirth and her apprenticeship to a two-faced master. The two of them fought with each other with wisdom, courage, and joy. The latter told the story of the female protagonist transmigrating to become the wife of the fox demon male protagonist. Usually, the female protagonist would pretend to be an assassin and then start a lot of funny stories with the male protagonist. I hope you like this fairy's recommendation. Muah ~😗

The story of Qing Yu Nian took place in the Southern Chen Kingdom during the Northern and Southern Dynasties. Although the Southern State of Chen was fictional, its background in the play corresponded to the Northern and Southern Dynasties. The Southern Chen Kingdom was a short-lived dynasty during the Northern and Southern Dynasties. Therefore, the story of "Celebrating Years" took place during the Northern and Southern Dynasties.

I recommend "The Ancient Space of the Apocalypse" to you. The female protagonist of this sci-fi space-future world novel accidentally discovered an ancient growth space hidden in a small stone. She collected materials in the apocalypse, found a new paradise, and helped the stone baby in the space to grow. At the same time, they would work together with the reincarnators to develop a paradise that belonged to them. Other than taking care of the child for a period of time, there was also some romance and nurturing content. I hope you like my recommendation. Muah ~

😋I recommend the following two novels to you: 1. "Not in Jianghu": The female protagonist, the heir of a company, transmigrated in her sleep and came to the underworld in an era of figureheads. She stole the palace and even stole the prince's wife. In order to pamper the female protagonist, the male protagonist crossed the grasslands with her, killed the enemy, and seized the city. Finally, after the return of love, he indulged in lust and played with the fireworks of the world. 2. [The Silly King is Too Gentle]: The illegitimate child of the female protagonist is reborn as the son of the Marquis's Mansion. She meets the male god, the Silly King, whom she has had a crush on since she was young. The two of them were childhood sweethearts. After going through many difficulties, they finally made it through. The female protagonist also took this opportunity to change her fate and become a powerful female character. I hope you like this fairy's recommendation. Muah ~😗

, I recommend the following novels to you. They might meet your needs ~ 1. "The Beautiful Husband Transformed": The modern female killer traveled through the ancient times. The first husband she married was a three-year-old child. He was extremely cute, but he was still too young. The plot of this novel is unique and very interesting. 2. <My Wife's Master Is Very Cold>: A modern female killer transmigrated to the Kingdom of Women and became the regent. The cold and heartless her had been able to move around freely in power, playing around with the martial world and the imperial court, becoming the leader of the evil palace in the martial world. Whether it was the storyline or the character description, they were all very good. 3. "The Reborn Poison Lady Can't Be Trifled With": The modern female assassin had traveled to another world. She wanted to live a stable life in this world, but she didn't want to meet a cold and heartless Demon Lord. In the story, the Demon Lord was exquisite and cold-blooded, while the female protagonist was trying her best to change her own fate. In the entanglement of the two people, each other was engraved in their hearts. I hope you like this fairy's recommendation. Muah ~😗

I have two novels here that meet the requirements. They are "The Gorgeous Husband Transformed" and "The Genius Godly Doctor Fifth Miss". The first novel was about a modern female killer who transmigrated into an ancient concubine's daughter and was given a marriage to a husband who looked like a three-year-old child. In order to wait for him to grow up, she began a series of adventures and legends. The second novel was about a 21st-century female killer who transmigrated to an ancient loser, surrounded by many men. She decided to use her modern knowledge to create an ordinary but amazing life. I hope you like this fairy's recommendation. Muah ~😗

I recommend "Cross-dressing as a Man: Big Boss, Don't Spoil Me", a modern romance novel about a wealthy family. The female protagonist was a killer in the secret service world. She was cold-blooded, arrogant, arrogant, and killed without blinking. She was pursued by her boss, the domineering CEO male protagonist. I hope you like this fairy's recommendation. Muah ~😗

😋I recommend the novel Rebirth of the Daughter of Your Mansion to you. The plot includes the story of the female protagonist marrying the least favored fourth prince after her rebirth and helping him ascend the throne. There were palace fights, conspiracies, and fights for the throne. It was very exciting. I hope you like my recommendation.😗