With this spell the wizard can alter their appearance and form - including clothing and equipment - to appear taller or shorter; thin, fat, or in between; human, humanoid, or any other generally man-shaped bipedal creature. The caster may only turn into other races or species they are personally familiar with. Simply reading about a Centyr is not enough to take the form of one.
The caster's body can undergo a limited physical alteration and size can be changed up to 50%. If the form selected has wings, the wizard can actually fly (treat as a skill with default of 15%, can be improved normally.) If the form has gills, the caster can breathe under water as long as the spell is maintained. However, the caster does not gain any multiple attack routines or additional damage allowed to an assumed form.
The caster's Attack and Dodge Skills do not change. The spell does not confer special abilities, attack forms, or defenses. Once the new form is chosen, it remains for the duration of the spell.
The caster can change back into his own form at will; this ends the spell immediately. A caster who is slain automatically returns to his normal form.