Living by the sword, dying by the sword, and being reborn to seek the sword.

A man who dedicated his entire life to the sword. Forging and wielding. Repeating this for seventy years. Satisfied with the single blade completed through the culmination of his refinement, the man took his own life with that very edge. What was created was strong and beautiful. So much so that a god from some other world, upon seeing it, was suddenly seized by a whim. The man was granted a new life. Along with materials he had never seen before, techniques he had never heard of, and above all, a world where he could wield them to his heart's content.