The Kachin Dao
S4, E14: This competition isn't smooth sailing as the four bladesmiths must use steel from old nautical equipment to forge weld their signature blade, while being forced to do it using a metal inlay technique.

S4, E14: This competition isn't smooth sailing as the four bladesmiths must use steel from old nautical equipment to forge weld their signature blade, while being forced to do it using a metal inlay technique.