Beneath the Borderlands
Duration: Until mission is completed
This spell summons (or perhaps creates) an invisible stalker, an invisible being with 8 HD. The stalker will perform one task as commanded by the caster, regardless of how long the task may take or how far the stalker may have to travel. The stalker cannot be banished by means of Dispel Magic; it must be killed in order to deter it from its mission.