Finally, if the item is to hold its magic for more than a single use, a permanency spell must be cast. This locks the trapped magic into the vessel, empowering it at the command chosen by the wizard. If the permanency is not used, the vessel only holds charges equal to the number of spells cast upon it.
If all these steps have been performed correctly and without interruptions, the item will be created...maybe. The process is long and involved and there are many opportunities for unintended error. Thus, when all is said and done, a success roll must be made. The basic chance of success is 60%. Each level of the wizard adds 1% to the chance, while each spell, special process, or unique ingredient used lowers the chance by 1%. The DM can further adjust the percentage for any extra-special precautions or notorious shortcuts the character might take.
If the check is passed (by rolling equal to or lower than the success chance) the desired item has been created. If the check fails, the item is cursed, although this may not be known until a much later time. The function of the item becomes perverted, the opposite of the character’s intention. A cursed sword, for example, could lower the character’s chances of hitting, while cursed gauntlets could render the wearer clumsy.
A character can’t seek to make a cursed item with the hope and intention that the process will fail (thereby gaining
a useful magical item). The nature of magical failure is such that the desired result, spoken or unspoken, never occurs.