What alchemy level should I be before I attempt to make steel cuffs? Read the combonation is Skeleton steel sword + skeleton iron sword but dont want to waste materials for a common stone or waste good money makers. And is there away around the alchemy book problem with regard to making an invisible knife (Skeleton steel sword + propeller + alchemy 1)? I see it on sale sometimes but I can't just wait for them to go on sale all the time.