Banishment

Caster Level(s): Cleric 6, Wizard / Sorcerer 7
Innate Level: 6
School: Abjuration
Descriptor(s):
Component(s): Verbal, Somatic
Range: Short
Area of Effect / Target: Colossal
Duration: Instant
Additional Counter Spells:
Save: Will negates
Spell Resistance: Yes

The caster is able to cause all summoned creatures, familiars, animal companions, and Outsiders in the area of effect to be destroyed. A number of creatures equal to twice the caster's level in HD can be banished.