Stalker

A priest casting this spell conjures 1d4 + 2 plant creatures which have statistics identical to shambling mounds of 11HD. These creatures will aid the caster in combat or battle, perform a specific mission, or serve as bodyguards. The creatures remain with the priest for seven days unless he dismisses them. If the stalkers are summoned onIy for guard duty, however, the duration of the spell is seven months. In this case, the stalkers can only be ordered to guard a specific site or location.
The stalkers gain resistance to fire as per shambling mounds only if the terrain is suitable (marshy, close to a body of water, etc.).

[Tome of Magic]

Sphere: Creation, Guardian, Plant
(Conjuration/Summoning)
Quest

Range: 30 yards
Components: V, S
Duration: Special
Casting Time: 1 round
Area of Effect: Special
Saving Throw: None