The Headbanger's Ball (college)

You were born to rock! You are one of the few and proud inducted into the prestigious Headbanger's Ball. Those of this college wade into battle proudly clad in heavy suits of armor, weapon ready to be brought to bear. They are like roiling thunder crashing through the battlefield with booming voice and cacophonous performance.

Credit to gpereira for the concept, originally College of Metal.

Heavy Metal

When you choose this College at 3rd level, you gain proficiency with medium and heavy armor, shields, as well as with the glaive, greataxe, greatsword, halberd, heavy crossbow, longbow, maul, and pike.

Vulgar Display of Power

Starting at 3rd level, you have learned to strike hard and rock even harder. A creature that has a Bardic Inspiration die from you can use its reaction when it is hit by an attack to roll that die and reduce the damage taken by an amount equal to the result of the die roll.

Additionally, you have the option to take a Bardic Inspiration from your own pool for a melee attack. When you hit a creature with a melee attack, you can cause a tremendous sound to erupt from your weapon. You roll a Bardic Inspiration die, dealing additional thunder damage equal to the result of the die roll plus your Constitution modifier (minimum 1) to that creature.

Kickstart My Heart

At 6th level, you have mastered the art of weaving spellcasting and weapon use into a single harmonious act. When you use your action to cast a bard spell, you can make one weapon attack as a bonus action.

Thunderstruck

At 6th level, you know the thunderclap cantrip as well as the thunderwave and shatter spells. These do not count towards your spells known.

Additionally when you reduce a creature to 0 hit points or score a critical hit, you can cast thunderclap, thunderwave, or shatter as a bonus action. You must still expend a spell slot as normal.

Symphony of Destruction

Starting at 14th level, you can unleash a performance the likes of which few have experienced. As an action, you and all creatures of your choice within 100 feet that can hear gain an inspiration die. These dice are not taken from your Bardic Inspiration pool.

Additionally 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 suffer 8d8 thunder damage and are deafened for 1 minute. On a successful save they take half as much damage and are not deafened. One you use this feature you cannot do so again until you complete a long rest.