You are part of a violent and loud group of bards whos musical stylings are looked at with distain. Other bards my call their music unrefined or uncultured, while clerics view their songs as a demonic war cry. In actuality, your songs and action invoke a powerful spirit of rebellion and freedom. Some might call you a devil, let's hope you can fight like one!

The Devil's Music

When you join the College of Rock at 3rd level, instruments you hold are empowered by magical electricity and produce booming sounds when you play them. All instruments you play are three times as loud. Additionally, you can read, write, and speak Abyssal and Infernal. These two languages are often used in your songs.

Song of Rage

Also at 3rd level, you may expend a use of bardic inspiration to preform a Song of Rage as an action. The song lasts for 3 minutes, and you must be wielding an instrument with both hands to preform the song. If you stop holding an instrument with both hands, the song ends early.

During the Song of Rage, all allied creatures who can hear you and are within a 30 foot radius of you, deal an additional amount of damage with their weapon attacks. This additional damage is equal to your charisma modifier (Minimum of 1).

The radius of your Song of Rage increases overtime, to 35 feet at 5th level, 40 feet at 10th level, and 45 feet at 15th level. 

Earth Shattering Sound

At 6th level, the powerful sounds produced by your music can command the very forces of nature. Your music allows you to learn spells normally associated with the druid class. When your Spellcasting feature lets you learn a bard cantrip or a bard spell of 1st level or higher, you can choose the new spell from the druid spell list or the bard spell list. You must otherwise obey all the restrictions for selecting the spell, and it becomes a bard spell for you. 

Showtime Spell

Starting at 14th level, when you use an action to preform your Song of Rage, you may cast a spell of 1st level or higher which deals lightning or thunder damage as part of that same action. When you cast a spell in this way, if it has a radius, increase that spell's radius by 15 feet. Additionally, you may select a number of allied creatures equal to your proficiency bonus which you can see. The selected creatures are immune to the effects and damage caused by the casted spell. You may use this feature once per long rest.