College of power

Bards of the college of power use loud music and singing and flashy showmanship enchanted with arcane power to demolish their enemies.

Rock show

Starting at 3rd level when you join the college of power you gain the ability to enhance your performance to disrupt and damage your enemies.

As an action you may expend one use of your bardic inspiration to deal fire or thunder damage equal to your bardic insperaton die to a number of creatures equal to half your proficiency modifier (rounded down) of your choice within 30ft of you.

If you choose to deal thunder damage the effected creatures must make a con save equal to your spell save dc or be deafened and on their turn they can take an action or a bonus action not both and they are unable to take reactions until the end of your next turn.

If you choose to deal fire damage the creatures must succeed a dex save equal to your spell save dc or be blinded and have their speed reduced by half until the end of your next turn.

Electrifying performance

The electrifying magic that enhances your performances crackles out from your instrument and dances among your allies.

As an action you may begin to play your instrument, while you play your allies attacks deal additional lightning damage equal to half of your proficiency bonus rounded down. On your following turns you may use your bonus action to continue to play, if you do not the performance and it's effects end at the end of your turn.

Visage of metal

When you reach 6th level your showmanship has reached new heights. As an action you shroud yourself in magical energy altering your appearance making you more appear more fearsome and flashy. For the next minute you have advantage on cha (intimidation) checks, and when you cast a spell that deals fire, lightning, or thunder damage, or use your rock show ability you deal additional damage of the same type equal to your cha mod. You must complete a long rest before you can use this ability again.

Rock star

Starting at 14th level when you use your rock show you may roll a d6 instead of expending a bardic insperaton die, additionally you may now use rock show as a bonus action.