Magic:Banishment

Abjuration
Level: Clr 6, Sor/Wiz 7
Innate Level: 6
Component(s): V,S
Casting Time: 1 action
Range: Short
Target: Colossal
Duration: Instantaneous
Counter(s): --
Saving Throw: Will negates
Spell Resistance: Yes
Metamagic: Quicken, Silent, Still
Energy Substitution: No

The caster is able to cause all hostile summoned creatures, elementals 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.