| Class and level | Magic-User 6 |
| Duration | One mission |
| Range | Summoned to caster's presence |
An invisible stalker (see B/X Essentials: Monsters) is summoned to the caster's presence and magically bound to perform a mission of the caster's choosing.
The caster must be careful with the wording of the mission. Invisible stalkers are treacherous and, unless the assigned mission can be easily and quickly accomplished, will follow the letter of the command while twisting the intent.
The creature is bound to attempt the mission until it succeeds or is destroyed.
The spell dispel evil will banish an invisible stalker, ending the spell.