Soundburst

Ranged spell
Daily
Target: 
1d4 nearby enemies in a group
Attack: 
Charisma + Level vs. PD
Hit: 
5d6 + Charisma thunder damage, and the target is dazed until end of your next turn.
Miss: 
Half damage, and deal thunder damage equal to your level to each of your allies engaged with the target.
3rd Level Spell: 
6d8 damage
5th Level Spell: 
8d10 damage
7th Level Spell: 
2d6 x 10 damage
9th Level Spell: 
3d6 x 10 damage
Adventurer Feat: 

On a natural even hit, the dazed effect is now save ends.

Champion Feat: 

The spell is now recharge 16+ after battle instead of daily.

Epic Feat: 

You can now target 1d4 + 1 enemies in a group with the spell.