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Source: Encyclopedia Arcane: Divination

Description: You have a supernatural ability to use your senses even when prevailing conditions would otherwise prevent you from doing so.

Prerequisites: Alertness, Ability to cast Divination Spells

Required for: Defensive Divination, Heightened Sight, Tremulous Touch, Wolfen Boon

You only suffer only half the listed penalty for any effect that limits your senses. Darkness and invisibility are among the effects you can diminish. You also gain a Will save anytime you are exposed to an effect that alters your perceptions, even if the effect does not normally allow one. In addition, you gain a +2 competence bonus to any saving throw caused by an illusion or sense-affecting spell (such as a Symbol of Pain or Blindness/Deafness.)