Physical Invisibility

This spell causes the recipient to vanish from sight and not be detectable by normal vision or infravision. The spell works similarly to dust of disappearance: The creature can attack and remain invisible, and even detect invisibility will not reveal it. The invisible creature is not silenced with respect to noise, nor are scent or tracks masked. Attack rolls against the invisible creature are at a -4 penalty in addition to any other bonuses or penalties that apply. Dust of appearance or a successful casting of dispel magic can negate the spell. Dispel illusion has no effect on this spell. True seeing or a similar power allows its caster to see the invisible creature. A character of high Intelligence or level may have a chance to detect the invisible creature, but if the invisible creature moves (as opposed to remaining in melee range), a successful detection attempt must be made each round to keep from losing track of it again.

The material components of the spell are a prism and a small mirror.