3rd level — Battlerager Armor

The path is built around spiked armor. While raging in that armor, you can make a bonus-action melee weapon attack with the armor spikes. The feature also adds piercing damage when you successfully grapple a creature.

6th level — Reckless Abandon

When you use Reckless Attack while raging, you gain temporary hit points based on your Constitution modifier. This partially offsets the risk of making yourself easier to hit.

10th level — Battlerager Charge

While raging, you can take the Dash action as a bonus action.

14th level — Spiked Retribution

While raging and wearing spiked armor, a creature close to you that hits you with a melee attack takes piercing damage from the armor.

How the features work together

The path rewards constant contact. Spiked armor supplies an extra attack while raging, Reckless Abandon softens the risk of Reckless Attack, and Battlerager Charge helps the Barbarian reach a new target without giving up the Attack action. Spiked Retribution then makes staying beside you costly for melee enemies.