A mechanical metal barrel that can be given to the Sculptor to enable Prosthetic Tool Upgrades. It appears to have been made to fit perfectly inside the wrist bone of the Shinobi Prosthetic. |
Reward from defeating Gyoubu Masataka Oniwa at the Ashina Castle Gate.
Unlocks Shinobi Prosthetic upgrades when given to the Sculptor at the Dilapidated Temple.