Banishment

Banishment was an abjuration spell that banished outsiders to their home plane.

Effects
A Banishment spell was a more powerful version of the Dismissal spell. It enabled the caster to force extraplanar creatures out of his home plane. The number and power of creatures that could be banished increased with the power of the caster. To target a creature, the caster had to present at least one object or substance that the target hated, feared, or otherwise opposed. Each such object or substance made it more likely the caster would overcome the target's spell resistance. For example, if this spell were cast on a demon that hated light and was vulnerable to holy water and iron weapons, the caster might use iron, holy water, and a torch in the spell.