Ragesinger

Ragesingers generally are spawned out of necessity. Weaker races generally adopt tenets of Ragesingers, such as furlbogs and goblins, out of pure drive to survive. Extremely attuned to the spirits and natural world as barbarians are, Ragesingers are tribal, often forgoing instruments for a spear or bone knife, setting them far apart from other bards. As a result, these casters are actually nature casters; and may learn druidic spells. The most notable "college" of Ragesingers belong to the ancient order found among the Skogarfolk. 

Recently found amongst the Dwarves as cultural mixing is occurring, the college is expanding very slowly. Skogarfolk are still weary of the very idea, though it is far more enthusiastically embraced by the Dwarves, and even a few Gnomes have been known to learn.

Bonus Proficiencies

When you become a Ragesinger, you gain proficiency with Medium Armor, Martial Weapons, and the Intimidation skill. In addition, if you have not gained the Vicious Mockery spell, you will obtain it.

Song Of Rage

Using chanting, wails, songs, or the banging of drums, spears on shields, and other din; the Bard calls upon the very spirits themselves. As an action, choose a number of allies within a range of 60 feet, up to a number equal to your Charisma modifier + your Proficiency modifier (minimum of one). While maintaining this song, the Bard may not cast spells, and must concentrate on maintaining the song. During their Song, they may additionally make an extra attack as a bonus action. The song may be maintained for up to a minute with each application, but can be seamlessly continued by expending another charge. The bard regains these charges on a long rest, and may use their Song of Rage an amount equal to their proficiency bonus per day.

Allies affected by the Song of Rage gain the ability to make Reckless Attacks, as a Barbarian may. They additionally have advantage on Strength checks and Strength Saving Throws, as well as Wisdom Throws against Fear effects. Finally, all allies gain an additional 10 feet of their perspective movement speeds for the duration of the Song of Rage. 

Furious Inspiration

As a bonus action during your Song of Rage, you may expend a Bardic Inspiration charge to grant your allies the effect of the die, as well of one of the following effects. The player may chose one option. 

They may either gain Rage as a Barbarian gets for the duration of their turn, with no exhaustion upon losing Rage. Their Barbarian level is equal to their player level for the sake of their Rage. They may instead opt to cast a Cantrip in addition to their action. 

Bloodlust

As an action, during their Song of Rage, the Ragesinger can enter a state of pure fury, expending a charge of their Song of Rage instantly. The Bard then continues their former song for its full duration. For the next minute after this action, all allies who were effected by the initial Song of Rage are granted the effects of the Haste Spell, and may enter a Rage as a Barbarian does for the duration. Their Barbarian level is equal to their player level for the sake of their Rage. They may instead continuously cast Cantrips alongside their action. Regardless of their choice, the effected allies must either use the attack action, or cast a spell offensively in order to maintain the Bloodlust. When the Song of Rage ends, the Bard gains a level of Exhaustion. They may preform a Bloodlust once a day.