Cog Shuriken (歯車 手裏剣) is an invention made by Shiratsuyu which in truth, are just cogs with sharpened edges yet they work just as well as an ordinary shuriken.
Cog Shuriken (歯車 手裏剣) is an invention made by Shiratsuyu which in truth, are just cogs with sharpened edges yet they work just as well as an ordinary shuriken.