Nondetection(Player's Handbook v.3.5, p. 257)
Level: Telflammar Shadowlord 2, Magewright 3, Hexblade 3 (Arcane), Court Herald 3, Urban Druid 3, Thayan Slaver 3, Sha'ir 3, Beguiler 3, Fatemaker 3, Slayer of Domiel 3, Ebonmar Infiltrator 3, Wizard 3, Sorcerer 3, Spellthief 3, Consecrated Harrier 4, Urban Ranger 4, Ranger 4, Beloved of Valarian 4, Trickery 3, Initiate of Astilabor (Feat) 3,
Components: V, S, M,
Casting Time: 1 standard action
Target: Creature or object touched
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.