Stack the Killing Knife at the Beginning, and Become the Leader of the World from a Pawn

If I have to lose everything to save myself, you can rest assured that I can't do it. My existence is not for you to sacrifice yourself. Be it brother or younger brother, I chose it and I will carry it myself. Handwritten fantasy, watch first and then like. The more you go on, the more exciting it becomes. A good story always needs to be foreshadowed.