Double-Necked Madness

You take both of your guitars and fuse them into one, creating a double necked guitar. The enemies are automatically Frightened for the rest of the encounter from this beast you created. You grab a pick and plug up the guitar and play. It sends deadly sound waves towards the enemies, causing them to go Prone for one turn. You keep on playing and deal 2d4 hit points to two enemies. You deal double damage when using the double necked guitar for the rest of the encounter. The guitars un-fuse after the encounter. You may use other spells with the double necked guitar, doing double the damage.

"Double the Guitar, Double the Destruction"