A friend used two Vorpalize Weapon scrolls on the same weapon. The second one made the weapon disappear... just a warning to anyone looking to turn their katana into a BFG-3000. Don't be greedy! Or just vorpalize your bow or another weapon, so you can turn another type of monster into a Happy Meal when needed.
Top 10 list of don'ts and spoil newbies the chance of getting a valuable learning experience? That happened to me once and at the time it was my only weapon. My thought was, "I'm so dead!"