Assassin's Creed has become quite a popular franchise churning out at least one title a year, and apparently their fanbase is so enamored with the signature weapons they are releasing them this October just in time for Halloween. The hidden blade features prominently in all of the games and was the obvious choice, the other weapon being released is the Cane Sword from Synidicate.
I saw a youtube video of a professional Blacksmith making a real hidden blade which you can check out below. The show Man at Arms is amazing for anyone into blacksmithing and they specialize in items from pop culture like Cloud's epic sword from Final Fantasy 7 and Captain America's shield. You weren't going to get any work done today, just watch these guys craft your dreams into reality for a few hours.