Song of Thunder

Bardic song
Daily
Action: 
Standard action each turn; 11+ to sustain
Attack: 
Charisma + Level vs. PD
Hit: 
5d6 + Charisma thunder damage
Miss: 
Opening & Sustained Effect: 

Make the following attack against 1d4 + 1 nearby enemies.

Final Verse: 

Make the attack again, but this time it deals half damage on a miss.

5th Level Spell: 
7d6 damage.
7th Level Spell: 
9d8 damage.
9th Level Spell: 
10d12 damage.
Champion Feat: 

The number of targets increases to 2d4.

Epic Feat: 

Two of the targets can now be far away instead of nearby.