Great Thunderclap

Caster Level: Wizard/Sorcerer 7
Innate Level: 7
School: Evocation
Components: V,S
Range: Medium
Save: See Below
Spell Resistance: No
Area of Effect: Gargantuan
Duration: Instant
Additional Counterspells: None
Description: You create a loud noise equivalent to a peal of thunder and its accompanying shock wave. The spell has the following effects on all creatures in the area:

They must make Will saves to avoid being stunned for 2 rounds.

They must make Fortitude saves or be deafened for 1 minute.

They must make Reflex saves or fall prone for 2 rounds.

They suffer 1d4 Sonic damage per Caster Level. (Max 20d4),Reflex saves for half.