Mass Suggestion

Schools: Enchantment (Compulsion) [Mind-Affecting, Language-Dependent]
Level: Brd 6, Sor/Wiz 6
Components: V, M
Casting Time: 1 action
Range: Medium (100 ft. + 10 ft./level)
Targets: One creature/level, no two of which can be more than 30 ft. apart
Duration: 1 hour/level or until completed
Saving Throw: Will negates
Spell Resistance: Yes

As suggestion, except that it can affect more creatures. The same suggestion applies to all these creatures.

The character influences the actions of the enchanted creatures by suggesting a course of activity (limited to a sentence or two). The suggestion must be worded in such a manner as to make the activity sound reasonable. The same suggestion applies to all targeted creatures.

The suggested course of activity can continue for the entire duration. If the suggested activity can be completed in a shorter time, the spell ends when the subjects finish what they were asked to do. The character can instead specify conditions that will trigger a special activity during the duration. If the condition is not met before the spell expires, the activity is not performed.

A very reasonable suggestion causes the save to be made with a penalty (such as -1, -2, etc.) at the discretion of the DM.