I'm thinking to print a line like "you feel this can be useful somewhere else" the first time player tries to use the handle and the blade and the second time lets the player to use it(or some kind of Y/N question maybe)
You could just set a boolean the first time, and then if they are determined to use it a second time then it's their own fault. You've warned them. As long as there is still a path to the end, I think it's okay.
