All-Flute

When the flute is played, tell the DM what song you play. The DM then interprets the spell and chooses an effect to match the song. 

Example: "Let the Bodies Hit the Floor" would knock out everyone in the room, while "All-Star" would turn the player into an ogre for 1d4 minutes, whatever the DM can come up with.

It can be used twice per short rest.