Charm Monster, Mass
Enchantment (Charm) [Mind-Affecting]
Level: Brd 6, Sor/Wiz 8
Targets: One or more creatures, no two of which can be more than 30 ft. apart
Duration: One day/level
This spell functions like charm monster, except that mass charm monster affects a number of creatures whose combined HD do not exceed twice your level, or at least one creature regardless of HD. If there are more potential targets than you can affect, you choose them one at a time until you choose a creature with too many HD.