This large, polished garnet brings luck to whomever possesses it. Once per day, the wearer receives a +10 luck bonus to either of the following; his AC against a single attack, a single attack roll, or a single check or save of his choosing. The power of a luckstone may be invoked after the corresponding attack, save or check has been made. Effects from multiple luckstones do not stack, either in the bonus given or in the times per day they are usable, as, as they say, luck should not be relied upon, nor taken in excess.