Spirit Ally, Greater

Oriental Adventures (OA)Oriental Adventures (3.0)
School
Conjuration (Calling)
Casting Time
10 minutes
Components
V, S, DF, F
Range
Close (25 ft. + 5 ft./2 levels)
Target
Up to 24 HD worth of spirits within 30 ft. of each other when they appear
Duration
Instantaneous
Saving Throw
None
Spell Resistance
No

As lesser spirit ally, except you may call a single spirit of up to 24 HD or a number of spirits of the same type whose HD total no more than 24.
The spirits agree to help you and request your return favor together.