Path of the Skald

3: Skaldic Tradition, Battlecry
6: Tears of Rage
10: Song of Heroes
14: Furious Performance

Skaldic Tradition
At 3rd level, you gain a pool of Skaldic Inspiration dice, starting at a d4. Your Skaldic Inspiration pool is the same size as your rage uses, and increases in die size each time your rage bonus damage increases. You can use Skaldic Tradition the same way you would use Bardic Inspiration, and regain all uses on a long rest.
Additionally, you may choose to use Charisma on Arcana, History, Nature, or Religion checks instead of intelligence, and gain proficiency with Performance and two instruments of your choice.

Battlecry
At 3rd level, when you rage, you may select up to your charisma modifier in willing creatures to join you. Those creatures gain your Rage Damage Bonus to their damage and saves for as long as you are raging. Alternatively, you may spend a Skaldic Inspiration die, and roll it. All creatures affected by Battlecry enter Rage with you, gaining it's full benefits, for the number of turns equal to your die's result.

Tears of Rage
At 6th level, you can inspire heroism and fury at great tragedy. When a friendly creature within sight that can hear you takes damage, you may spend a Skaldic Inspiration die to immediately cause that creature to fly into a rage until the end of its next turn, reducing the damage taken by the die result plus your rage damage modifier. If you are Raging, they may gain the effects of your Battlecry as well.

Song of Heroes
At 10th level, you have come to memorize and internalize the many songs of heroes past. Once per short rest, you may spend a Skaldic Inspiration die to cast a spell of 3rd level or lower from the Bard Spell list at 3rd level. You may cast this spell while raging, and concentration on it is not broken while raging.

Furious Performance
At 14th level, you have advantage on Performance checks while raging, making a performance check counts as making an attack for the purposes of maintaining rage, and all instruments you are proficient in can be used as an improvised weapon with no penalties, as if it was a weapon. Additionally, when you spend an Inspiration as part of your Battlecry, you and all allies affected gain the effects of your danger sense and resistance to non-force damage.