Wish is the mightiest spell a wizard can cast. By simply speaking aloud, you can alter reality to better suit you. Even wish, however, has its limits.
The following effects are gauranteed to be within the power of a wish:
Wishes for one of the above effects cause the caster no disability (excepting the aging effect). Duplicated spells allow saves and spell resistance as normal (but save DCs are for 9th-level spells). When a wish spell duplicates a spell with a material component that costs more than 10,000 gp, you must provide that component.
Effects beyond the above, that may exceed these in scope and power, may be wished for. (See Wishes & Miracles for a discussion about how these mighty magics work in the Worlds of Adventure campaign.) A wish for an effect greater than the above deals the caster 2d6 points of Strength damage (but can’t bring Strength below 1), and makes the caster exhausted; the exhaustion and ability damage are not curable with magic (except for an instant weekend or instant vacation potion).
Components: If wish is cast as a standard action, it ages the caster 5 years but has no costly components. The spell may also be cast as a ritual taking 8 hours; the caster suffers no aging in this case, but must provide magical components totaling 25,000 gp (special incenses, costly sacrifices, rare crystals arranged in the right way, etc.); these are consumed in the process of the ritual. (Consult your DM for details on the acquisition of such components, as well as any special requirements—location, time of year, etc.—that such a ritual may have.) At the completion of the ritual, the caster may choose to have the effects of the wish occur immediately, or he may wish to store it for later activation.
In the latter case, the caster must first prepare a spell scroll, using the Arcane Script skill (this works just like scribing a scroll of a 9th-level spell normally does, except that the spell need not actually be cast yet). When the ritual is completed, the power of the wish is stored in the scroll, which may be read later. (This is the only way that scrolls of wish may be created, and the only such scrolls that can exist; a scroll of wish may never contain a "general" wish spell usable to wish for any effect.) When storing the power of a wish spell in a scroll, the caster need only specify the type of effect he chooses, not the details (for example, a wish scroll may contain a wish for travelers to be transported, but need not specify exactly which creatures are to be moved, nor the source or destination of travel).