A Specter in a Fantasy World!

Kage used to be a killer. Not a hero. Not a victim. Not someone looking for redemption. In his previous life, he lived in the shadows, taking lives for money, pleasure, and the brief illusion of superiority. But after a mission inside a strange laboratory ends in flames, explosions, and a mysterious device, Kage awakens in a world he does not understand. A world of adventurers, magic, monsters, ancient ruins, and ridiculous party names. There is only one problem. He is no longer human. Trapped inside an ancient capsule beneath a forgotten dungeon, Kage is released by a chaotic party of beginner adventurers who were definitely not prepared to find a living mass of darkness. Now reborn as a specter, he can move through shadows, shape darkness into weapons, and steal the shadows of the living. To this fantasy world, he is a curse. To the adventurers who found him, he is a problem. To himself, he is still a killer. But as Kage learns the rules of his new existence, he begins to face something more terrifying than monsters, gods, or holy light: the value of a life he cannot easily take back. A dark fantasy isekai about shadows, second chances, terrible decisions, and a fantasy world that was absolutely not ready for a specter.