Sensing - Clairvoyance
The caster can see within a specific range through obstacles and structures. The range is equal to the area of spell (see the Magical Limits Table). The character can quickly scan the area of spell for any unusual activities, but the actual area focused in on and viewed, within this range, may be no larger than a 20' sphere. It is affected as sight normally would be by darkness, light attacks, and so on.
This spell requires a great deal of concentration. It can be used simultaneously only with similar Sensing spells.
This is the magical version of Clairvoyance.