This spell grants the character a powerful sixth sense in relation to his or herself or another. Once the spell is cast, the character receives instantaneous warnings of impending danger or harm to the subject of the spell. The character is never surprised or flat-footed. In addition, the spell gives the character a general idea of what action the character might take to best protect him or herself - duck, jump right, close the eyes, and so on—and gives the character a +2 insight bonus to AC and to Reflex saves. This insight bonus is lost whenever the character would lose a Dexterity bonus to AC.

When another creature is the object of the spell, the character receives warnings about that creature. The character must communicate what the characters learn to the other creature for the warning to be useful, and it can be caught unprepared in the absence of such a warning. Shouting a warning, yanking a person back, and even telepathically communicating (via an appropriate spell) can all be accomplished before some danger befalls the spell subject, provided the character acts on the warning without delay. The subject, however, does not gain the insight bonus to AC and Reflex saves.