I am the blade that cuts everything

Rein is confident, withdrawn, and moving through life without ambition, content with simply existing. When he is torn from his world and cast into another already ravaged by a war beyond reason, survival becomes his only option. Wounded, hunted, and surrounded by violence that does not care who he is. Rein must now survive, not only that, but he must win whatever challange comes his way. Each victory keeps him alive, but every swing dulls something inside him, forcing Rein to confront how much of himself he is willing to lose just to keep moving forward. *** I would like to say that the please bear with my bad pacing. I am a new author and am still learning. the mc is not overpowered, thought he will still be immensely strong even compared to those around him. the conversation may feel awkward and unnatural, for which again, I am sorry also, no harem.