The limited wish is a very potent but difficult spell. It will fulfill literally, but only partially or for a limited duration, the utterance of the spellcaster. Thus, the actuality of the past, present, or future might be altered (but possibly only for the wizard unless the wording of the spell is most carefully stated) in some limited manner. The use of a limited wish will not substantially change major realities, nor will it bring wealth or experience merely by asking. The spell can, for example, restore some hit points (or all hit points for a limited duration) lost by the wizard. It can reduce opponent hit probabilities or damage, increase duration of some magical effect, cause a creature to be favorably disposed to the spellcaster, mimic a spell of 7th level or less, and so on (see the 9th-level wish spell). Greedy desires usually end in disaster for the wisher. Casting time is based on the time spent preparing the wording for the spell (clever players decide what they want to say before using the spell). Normally, the casting time is one round (most of it being taken up by deciding what to say). Casting this spell ages the caster one year per 100 years of regular life span.