This spell summons an invisible stalker from the Elemental Plane of Air. This 8 hit die monster will obey and serve the spell caster in performance of whatever tasks are set before it. However, the creature is bound to serve; it does not do so from loyalty or desire. Therefore, it will resent prolonged missions or complex tasks, and it will attempt to pervert instructions accordingly (for complete details of the invisible stalker, consult ADVANCED DUNGEONS & DRAGONS, MONSTER MANUAL). The invisible stalker will follow instructions even at hundreds or thousands of miles distance. The material components of this spell are burning incense and a piece of horn carved into a crescent shape.