Alter Reality

The alter reality spell is similar to the seventh level magic-user limited wish spell (q.v.). 

In order to effect the magic fully, the illusionist must depict the enactment of the alteration of reality through the casting of a phantasmal force, as well as verbalization in a limited form, before the spell goes into action.

LIMITED WISH

A 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 spell caster. Thus, the actuality of the past, present or future might be altered (but possibly only for the magic-user unless the wording of the limited wish 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 magic-user. It can reduce opponent hit probabilities or damage, it can increase duration of some magical effect, it can cause a creature to be favorably disposed to the spell caster, and so on (cf. wish).

The limited wish can possibly give a minor clue to some treasure or magic item. Greedy desires will usually end in disaster for the wisher. 

Casting time is the actual number of seconds — at six per segment — to phrase the limited wish.