Soul Land V: Rebirth of Tang San - Chapter 43 - 42 Devour, Merge

A skilled but unfortunate modern-day assassin was killed in a freak accident. However, he soon found himself summoned to another world by an evil wizard, who had him possess the body of a boy as an experiment. After successfully planning the evil wizard’s downfall, he used the wizard’s body as a springboard to gain influence and power in his new world.

- Description from Novelupdates

When Astrid transmigrated into the fantasy webnovel she once read, she found herself in the shoes of the story's most hated villainess, a character destined for a tragic end.According to the original plot, the Main Protagonist is hell-bent on killing her at all costs, her cunning step-sister schemes to throw her into the dungeon and usurp the throne at the first opportunity, and even her loyal caretaker has abandoned her.With enemies on all sides and time running out, Astrid realizes her fate is sealed unless she takes matters into her own hands.Determined to survive, Astrid decides to fight back, but as she begins to navigate this world, something feels... off. Why is the Main Protagonist, now showing her unexpected kindness? Why is her step-sister, who should be plotting her downfall, suddenly seeking her favor?••••••It's a yuri harem novel.

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy

In the 21st century, she was the talented leader of the hidden family clan, once she crossed over, she became the number one waste?