Cacophonic Shield(Magic of Faerûn)
Level: Bard 6, Sorcerer 6, Wizard 6,
Components: V, S,
Casting Time: 1 action
Range: 10 ft.
Area: 10-ft.-radius emanation, centered on you
Duration: 1 minute/level
Saving Throw: Fortitude partial
Spell Resistance: Yes
You create an immobile barrier of sonic energy at a distance of 10 feet from yourself.
Creatures on either side of the barrier hear it as a loud but harmless buzzing.
Nonmagical sound (including sound produced by a thunderstone) does not cross the barrier.
If a sonic effect impinges upon the barrier, you get to make a caster level check (1d20 + caster level) against the DC of the effect to prevent it from affecting anyone inside the barrier.
A creature that crosses the barrier takes 1d6 points of sonic damage plus 1 point per caster level (maximum +20) and must make a Fortitude save or be deafened for 1 minute.
The sonic vibrations provide a 20% miss chance for any missiles crossing the barrier in either direction.