Anime / Manga - Swordmen by Lee Dragon Garou

I feel sorry for the person who had to list every single character in the tags.

I am the Bone of my Sword
Steel is my Body and Fire is my Blood.
I have created over a Thousand Blades,
Unknown to Death,
Nor known to Life.
Have withstood Pain to create many Weapons
Yet those Hands will never hold Anything.
So, as I Pray--
Unlimited Blade Works