College of Dwarvenkind

Dwarves rarely go to war, and even rarer do they attack, but when a dwarf gets involved wars end quickly. Dwarven Phalanxes are a force to be reckoned with and driving each and every squadron of metal-encased soldiers is a drummer. Stomping to the beat they drum those who've studied the College of Dwarvenkind drive the beat to which their allies drive back hordes. with powerful buffs and area-of-effect abilities, no matter the number of allies under your purview, your beat never falters, and your drumming never stops.

March to My Own Beat

When you join the College of Dwarvenkind at level 3,  As an action you may expend one use of your Bardic Inspiration to active your Warsong, While active you cannot perform tasks that require both hands, not including casting spells, and you must make concentration checks when attacked or you lose hold of the song and the effects end, additionally, you gain the following abilities:

Marching Tune. As a Bonus Action, you may change the beat of your Warsong, Until you change the beat all allies within 60 ft. that are not deafened gain an additional 5 ft. of movement and can take the Dodge action as a bonus action.

Killing Beat. As a Bonus Action, you may change the beat of your Warsong, Until you change the beat all allies within 60 ft. may add your charisma bonus to one attack they make on their turn.

Melody of Strength. As a Bonus Action, you may change the beat of your Warsong Until you change the beat all allies within 30 ft. regain one hit point at the end of your turn, allies who are at or below one hit point instead succeed one death saving throw. 

Song of Silence. As a Bonus Action you may change the beat of your Warsong, Until you change the beat all creatures within 60 ft. of you are considered mute and deaf, though for the purposes of your spells and abilities, they can all hear you. 

Soldiers Resonance

Also at 3rd level, Your song empowers your allies and makes them more cohesive, While singing your Warsong, allies within 60 ft. of you gain the ability Shield Wall,

Shield Wall.  When an ally is adjacent to one other ally with the shield wall ability they gain +1 AC, when they are adjacent to two or more allies they gain +2 to their AC. if three or more allies stand in a line and are adjacent to each other, all enemies have disadvantage on the first attack they make against the group of allies. AC bonuses from Shield Wall do not stack.

Marching Orders

At 6th level, you may, as an action give inspiration to an ally within 60 ft of you, additionally, While in your Warsong, you may also, once per Warsong expend an additional use of your bardic inspiration to allow all allies within 60 ft. take another action immediately, if they do not they gain temporary hit points equal to double your level in bard. 

One Man Marching Band

Starting at 14th level, Once per long rest as an action, while in your Warsong, you may activate all beats at once, additionally, you may cast cantrips as a bonus action. this transformation lasts for 3 minutes or until your Warsong ends.