Path of the Frenzy Berserker

Ever since you could see the stars you've known you were destined for glory on the battlefield. You've dedicated your life to becoming a great warrior. Barbarians that take this path are usually leaders and protectors—chieftains, war leaders, jarls, and khans—who stand resolute in the face of tyranny and oppression, and in so doing attain glory that transcends this mortal flesh. Champions of their people, their presence inspires allies to go that extra mile when weapons clash.

Frenzy

Starting when you choose this path at 3rd level, you can go into a frenzy when you rage. If you do so, for the duration of your rage you can make a single melee weapon attack as a bonus action on each of your turns including this one. When you start your rage you suffer one level of exhaustion.

Mindless effort

Beginning at 3rd level, While raging you are not affected by the effects of exhaustion while raging.  

Mindless Critical

Beginning at 6th level, While ragging and you scores a critical hit against a creature you can reduce a level of exhaustion. You can do so a number of times equal to your proficiency bonus At 10th level, your weapon attacks score a critical hit on a 19 or 20 on the d20 while in Relentless Frenzy.

Relentless Frenzy

Beginning at 10th level, You can give yourself a point of exhaustion to bring yourself into a relentless frenzy, for 1 minute with Frenzy your bonus action attack increases from 1 to 2. 

Retaliation

Starting at 14th level, when you take damage from a creature that is within 5 feet of you, you can use your reaction to make a melee weapon attack against that creature.