Suterareta Yuusha no Eiyuutan - Story 4-1: 『Sleeping Beauty』

Forget about moving to the other side of the world and starting over.The Apocalypse is here!As the only survivor of the Tutorial Quest in his area, Elijah awakens the Class of “Depraved Hero”, an ominous-sounding Class with a Legendary Rank!Additionally, because of the insane difficulty as well as his Clear Rank, he gains the Skills that, according to the mysterious figure that is the Administrator, he needs most.[You have Developed the Skill “Absolute Authority[A]”.][You have Developed the Skill “Slave Mark[C]”.]

Four years ago, she was an abandoned heiress casually thrown away by her family.Four years later, she became a big shot with countless honors and huge power.When she returned to her country with her babies, a man was already waiting for her at the airport, “You disappeared for four years after giving birth to my child. I will never let you run away again.”……Her triplet babies are extremely talented.Eldest, “Who dare bully our mommy? I'll hack their information and broadcast their scandals globally!”Second, “I'll make a call to immediately impose a restraining order and freeze their assets!”Youngest smiled at his two brothers, “Brothers, no need to bother! I just mention our daddy's name, and they've come to the building begging for forgiveness.”

The simulation is over, and the entry is obtained: a showdown!

Looking at this entry, Zhao Meng was stunned.

“How should this term be used?”

“Hey! Here’s a wounded fox!”

…

A few years later, a woman who looked like a fairy appeared in front of him, and said:

“My lord, I’m here to repay my favor!”

This book is also called “Starting from Transforming Monsters”

- Description from novelbuddy

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.