Warband Quest

A priest may cast warband quest on any group of 200 creatures who are capable of understanding his commands. The creatures are then affected in a manner similar to the 5th-level priest spell, Quest. Unwilling creatures are allowed a saving throw with a -4 penalty to avoid the effects.
The specified quest must be related to the reason that the deity granted this spell (perhaps a quest to slay or overcome a specified enemy).
Warband quest gives subjects of the spell a bonus of 2 hp per level of the caster (maximum 20 hp). Subjects also gain the effects of a Prayer spell and have Morale of 18 while on the quest. These benefits last for the duration of the spell; the spell ends when the specified task is completed. A creature who abandons the quest is subject to the wrath of his deity.

[Tome of Magic]

Sphere: Charm, War
(Enchantment/Charm)
Quest

Range: 240 yards
Components: V, S
Duration: Special
Casting Time: 1 round
Area of Effect: 200 creatures
Saving Throw: Negates