Path of the Reaver

While other warriors begin to flag as their injuries accumulate, the Reaver draws strength from their pain, actively seeking injury to fuel their bloodlust. Barbarians that follow the Path of the Reaver are often met with fear and suspicion.

Bloodrage

The sight of your own blood drives you into a frenzy, increasing your weapon damage as your health decreases. At 75% health, add a d4 to your damage rolls, at 50% a d6, at 25% a d10. When you reach level 15, the bonus damage increases to a d6, d8, and d12 respectively. 

War Cry

At level 6, your lust for blood begins to echo in your foes. As a bonus action, you may let out a war cry to drive your enemies into a fury. Enemy creatures within 50 feet of you must make a Wisdom Save equal to your Armor Class. Creatures that fail have disadvantage on attack rolls against any creatures other than you for 1d4 turns. You may use this ability a number of times equal to your proficiency bonus per short rest.

Bloodfocus

At level 10, your proximity to death helps you to focus in battle, increasing your critical range as your health decreases. At 75% health, your critical range increases by 1. Range increases by 2 at 50%, and 3 at 25%.

Inspiring Cry

At level 14, you have learned to inspire your allies with your War Cry. Any allies within 30 feet of you when you cry out gain a +1 bonus to their AC and advantage on saving throws for the ability's duration. Additionally, if an attack succeeds against an ally, that ally may use their Reaction to make an Opportunity Attack against the attacker.