Path of the Berserker Revised

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

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. As a side-effect of going into this state, you take extra damage equal to your (Rage Damage + your Proficiency Bonus) from any attacks that you are damaged by while in this state.

Mindless Fury

Beginning at 6th level, you can’t be charmed or frightened while raging. If you are charmed or frightened when you enter your rage, the effect is suspended for the duration of the rage. 

Horrifying Rampage

Beginning at 10th level, you can terrify your opponents when they witness your prowess. When you reduce a hostile creature to 0 hit points while raging, all creatures of your choice within 30 feet of you that can see you must succeed on a Wisdom saving throw (DC equal to 8 + your proficiency bonus + your Strength modifier) or be frightened of you until the end of your next turn. If the creature succeeds on its saving throw, you can't use this feature on that creature again for 24 hours.

Retaliation

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