Abjuration
Abjurations are protective spells. They create physical or magical barriers, negate magical or physical abilities, harm trespassers, or even banish the subject to another plane of existence. Representative spells include protection from evil, dispel magic, antimagic field, and banishment.

If more than one abjuration spell is active within 10 feet of another for 24 hours or more, the magical fields interfere with each other and create barely visible energy fluctuations. The DC to find such spells with the Search skill drops by 4.

If an abjuration creates a barrier that keeps certain types of creatures at bay, the barrier cannot be used to push away those creatures. If you force the barrier against such a creature, you feel a discernible pressure against the barrier. If you continue to apply pressure, you break the spell.