This spell functions as [_disguise self_](/spells/disguise-self), except as a swift action you can alter the disguise (within the limitations of [_disguise self_](/spells/disguise-self)). For example, you could make yourself look like a young human city guard, then an old elven wizard of the opposite gender, then a halfling thief, and so on. You can change the disguise a number of times equal to your caster level.