Path of the Frenzyed fighter

For some barbarians, rage is a means to an end—that end being violence. The Path of the Berserker is a path of untrammeled fury, slick with blood. As you enter the berserker’s rage, you thrill in the chaos of battle, heedless of your own health or well-being.

Frenzy Rage

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 after this one. When your rage ends, you suffer one level of exhaustion.

Hasted Rage

Beginning at 6th level, when you enter your frenzy rage your blood flows fast and time slows as you gain the effects of the haste spell. Until your Rage ends, your speed is doubled, you gains a +2 bonus to AC, and have advantage on Dexterity saving throws, you also gain an additional action on each of your turns. That action can be used only to take the Attack (one weapon attack only), Dash, Disengage, Hide, or Use an Object action.

When your rage ends alone with the point of exhaustion, you can't move or take actions until after your next turn, as a wave of lethargy sweeps over you.

Savage Rage

Beginning at 10th level, When you are in a Frenzy Rage and take the attack action you can make three attacks instead of two.

Mindless ones last stand

Starting at 14th level, When you are in a Frenzy rage pain becomes less importin then the death of you enemy's after you drop below half your max Hit Points your crit range increases to 19-20, if you are below 1/4th your max Hit Points then your crit range increases to 18-20, and if your drop to 1 hit point then your crit range increases to 17-20.