Ring of Darkness: These rings are nondescript, having no markings, gems, runes, or distinguishing characteristics to indicate that they are magical or valuable; however, they do radiate magic if detected for. A ring of darkness allows the user to cast darkness 15' radius once per day, at the cost of a single charge. Such rings will have from 2-20 charges when found, and can be recharged. Note that there is a 5% chance that a shadow (qv.) will seep into the summoned darkness from the plane of shadow and immediately attack the wearer of a ring of darkness each time the item is employed.