Enchantment (Charm) [Mind-Affecting]
Level: Bard 4, Sorcerer 5, Wizard 5
Components: V, S
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Targets: One or more creatures, no two of which can be more than 30 ft. apart
Duration: 1 hour/level
Saving Throw: Will negates
Spell Resistance: Yes
This spell functions like charm person, except that mass charm person 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.
Source: Races of Destiny, page 164.