Path of the Berserkir

Berserkir were those who were said to have fought in a trance-like fury.

Berserkgang

Starting when you choose this path at 3rd level, while raging you hit a creature with a melee weapon attack, the lowest number you must roll on the d20 to score a critical hit with subsequent melee weapon attacks decreases by one. You can gain this benefit multiple times, but it can’t reduce the threshold for scoring a critical hit below 16. You lose this benefit if you miss with an attack or your rage ends. Additionally, while raging you have resistance to fire damage. 

Trance Rage

At 6th level, while raging you have advantage on Charisma saving throws and immunity to be charmed or frightened. If you are charmed or frightened when you enter your rage, the effect is suspended for the duration of the rage.

Frightening Presence

At 10th level, while raging you can use your bonus action to frighten someone with your menacing presence. When you do so, choose one creature that you can see within 30 feet of you. If the creature can see or hear you, it 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. On subsequent turns, you can use your bonus action to extend the duration of this effect on the frightened creature until the end of your next turn. This effect ends if the creature ends its turn out of line of sight or more than 60 feet away from you.

If the creature succeeds on its saving throw, you can’t use this feature on that creature again for 24 hours. Additionally, you add your Strength modifier on Intimidation checks.

Payback

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.

Bloodthirsty Critical

Finally 14th level, whenever you score a critical hit with a melee attack, you can instantly make one melee weapon attack.