Planar Binding, Greater
Conjuration (Calling) [see text for lesser planar binding]
|Targets:||Up to three elementals or outsiders, totaling no more than 18 HD, no two of which can be more than 30 ft. apart when they appear.|
This spell functions like lesser planar binding, except that you may call a single creature of 18 HD or less, or up to three creatures of the same kind whose Hit Dice total no more than 18. Each creature gets a saving throw, makes independent attempts to escape, and must be persuaded to aid you individually.