One Piece: I Specialize in Forging Weapons from the Underworld

A story about joining a crew, as the second-in-command.

I transmigrated into the world of pirates and started out as a blacksmith, but why does everything I forge seem so sinister?

A pistol that sucks blood? A poison blade that scores a critical hit with every slash? And even a water sword that can spread out?

I may be weak, but my weapons are strong. Do you even understand the value of forging three thousand blades, each with its own unique way to kill?