Archon's Trumpet

Evocation [good, sonic]
Level: Bard * 5, Cleric */Oracle * 7, Paladin * 4, Sorcerer */Wizard * 7
Components: V, S
Casting Time: 1 Standard Action
Range: 30 ft.
Area: 30 ft. cone-shaped burst
Duration: instantaneous
Saving Throw: Fortitude negates
Spell Resistance: yes

Upon hearing a booming report, as if from a trumpet archon's mighty horn, all creatures in the area of the burst are Paralyzed for 1d4 rounds.