The 9th Class Swordmaster: Blade of Truth - Chapter 14: Choosing the Sacrifice

Carn wakes up from a vivid dream where he spent a thousand years as a gargoyle, guarding a demon lord's tomb.In this dream, he possessed supernatural powers, including the ability to teleport and instantly kill anyone within range who broke eye contact with him. Heroes, saintesses, adventurers, all fell before him.When he returns to his normal life, things take a strange turn. Carn realizes he still has the gargoyle’s powers, and the world he has woken up to seems different.But adjusting to the new reality is not the real issue. Carn brings back something nobody in this world has imagined. Not only he imports his powers to this alternate Earth, but he also carries over his gargoyle instinct and his hobby. He loves snapping human necks.Whether it's ordinary humans, explorers, super soldiers, cyborgs, mutated beasts, monsters, or mysterious entities from other dimensions, Carn eagerly anticipates snapping their necks, one neck at a time...In secret, of course.

“I'm sorry, Kiara,” he began, his voice heavy with regret. “We regret to inform you that we can no longer administer these drugs to you.”I was dying. I was going to die.Kiara Williams was dying from Stomach Cancer. With only a few months to live, she could only stay at the hospital.Alone. Her annoying husband did not come and visit her, only her best friend, Jessica remained by her side. She could no longer pay the bills and was sent home.Arriving at her house she caught Jessica and her husband together in bed. In a fight, her husband pushed Kiara down the stairs.Kiara died.Or did she? She was reborn ten years back, but rather than being destroyed, she begged a strange man for a one night stand unless she may die again.

Aoki’s resolute face was indifferent. “If the sun doesn’t shine on me, please let me be surrounded by darkness!”
From a different perspective, look at the entire Pokemons world.

- Description from Uukanshu