Read the chapter and then you learn it. As for making it, you have two choices:
1. Go to a crafting station, blacksmith in this case, and make it. You will need a Style Mat or a Mimic Stone and metal appropriate to your level. Also may need some skill investments in blacksmithing depending on your level.
2. Go to an Outfit station and you can choose this as a skin for your Daggers. This will cost you gold, but you need no crafting mats or skills to use the Outfit Station.
Enjoy the game, life is what you really want to be worried about.
PakKat "Everything was going well, until I died"
Gary Gravestink "I am glad you died, I needed the help"