Nondetection

Player's Handbook v.3.5 (PH)Core (3.5)
School
Abjuration
Casting Time
1 standard action
Components
V, S, M
Range
Touch
Target
One creature or object
Duration
1 hour/level
Saving Throw
Will negates (harmless, object)
Spell Resistance
Yes (harmless, object)

The warded creature or object becomes difficult to detect by divination spells such as clairaudience/clairvoyance, locate object, and detect spells. Nondetection also prevents location by such magic items as crystal balls. If a divination is attempted against the warded creature or item, the caster of the divination must succeed on a caster level check (1d20 + caster level) against a DC of 11 + the caster level of the spellcaster who cast nondetection. If you cast nondetection on yourself or on an item currently in your possession, the DC is 15 + your caster level.

If cast on a creature, nondetection wards the creature’s gear as well as the creature itself.

Material Component: A pinch of diamond dust worth 50 gp.