College of Metal - My Definitive Version

College of Metal

You are one of the few and proud inducted into the prestigious College of Metal, founded long ago by the legendary musician known as Sabbath, The Black.
A strange breed of Bards, the members of this college are known for their love of loud music, as well as raucous, near-violent parties which often involve an odd form of dance-combat; a style copied by their more enthusiastic fans. They wade ecstatically into war, being able to strike hard against their foes or empower their allies with their music. The flames of the Abyss in their tongues, the horns of Valhalla in their songs, the spirit of demons and the undead in their hearts; they are like roiling thunder crashing through the battlefield with booming voice and cacophonous performance.

Heavy and Metal

When you adopt this college at 3rd level, you gain proficiency with medium and heavy armor, as well as martial weapons. Additionally, you learn the Shocking Grasp cantrip.

Power Shredding

Also at 3rd level, you become proficient in a new type of instrument of your design, which can be powered by the lightning you generate: the Heavy Instrument.
Crafting this item takes a total of 4 hours, and 20gp worth of materials. The item's appearance can be that of a guitar, bass, lute or any other string instrument. When wielding it in battle, it also functions as a martial weapon of your choice.
As a bonus action, you can cast Shocking Grasp on your Heavy Instrument, leaving it powered up for 1 minute. While in this state, the sound it produces becomes that of an electric guitar, and lightning constantly crackles around it. You may add your Charisma modifier to the damage of any spells you cast through your powered up instrument, as long as the spell doesn't have a range of touch. You must finish a short or long rest before you can power it up again.

Scream of the Banshee

At 3rd level, when a creature you can see within 30 feet of you makes an attack roll, ability check or saving throw, you may use your reaction and expend one of your Bardic Inspiration dice to let out a high-pitched scream of pure metal power; interrupting the process of what the creature was doing.
The target must make a Wisdom saving throw, with the DC being equal to 10 + your Charisma modifier. On a failed save, the creature’s original roll is changed to an automatic fail and it becomes frightened of you for 1 turn. Additionally, all creatures within 15 feet of you that can hear take thunder damage equal to your Bardic Inspiration die roll.
You can use this feature a number of times equal to your Charisma modifier, and you regain all expended uses when you finish a long rest.

Thunder Rolls

At 6th level, you masterfully integrate your performance into your combat:

• You learn the Thunderclap cantrip, as well as the Thunderwave and Shatter spells.
  
  
• While powered up, when you hit a creature with an attack on your turn, you can cast a cantrip as a bonus action.
  
  
• While wielding your Heavy Instrument, you can attack twice, instead of once, whenever you take the Attack action on your turn.

Symphony of Battle

Starting at 14h level, you can unleash a performance the likes of which few have experienced.
As an action on your turn, you and all allies within 100 feet of you that can hear gain an inspiration die. These dice are not taken from your Bardic Inspiration pool.
Additionally, all hostile creatures within 50 feet of you that can hear must make a Constitution saving throw against your spell save DC. On a failed save, they take 8d6 thunder damage and are stunned for 2 rounds. On a successful save, they take half as much damage and are not stunned.
Once you use this feature, you cannot do so again until you finish a long rest.