Anauroch: Empire of Shade, pg 141.
Here's the full text, because I don't care about the law:
Mystic Shield
Abjuration
Level: Sorcerer/wizard 8
Components: V, S, M
Casting Time: 1 round
Range: Touch
Target: Creature touched
Duration: 1 round./level (D)
Saving Throw: Will negates (harmless)
Spell Resistance: Yes (harmless)
With the casting of your spell, you feel a presence about you, warding off the spells of other casters. This spell creates an invisible aura around the recipient that moves with that individual. It prevents all spells and spell-like abilities of 6th level or lower from affecting the recipient. The protected individual can cast spells normally, even on himself. Magic items and spells that summon items to the caster such as and likewise function normally. A Mystic Shield