Path of the Furious Berserker

Sometimes anger and fury is all one needs to defeat any enemy. Barbarians that follow this path believe in this statement wholeheartedly and their fury makes raging fires of nine hells look  like sparks and embers. They can shape their rage with Fury, becoming stronger and more dangerous as they become angrier and angrier.

Fury

Starting when you choose this path at 3rd level, you can empower your rage and effects it provides to you with Fury.. Maximum amount of Fury charges equals your maximum amount of rage charges and cap at 10 once you reach lvl 20. You restore 1 charge of Fury when you score a critical hit on a hostile creature or when you drop such creature to 0 hit points. Fury charges recharge fully after finishing a long rest.

Furious strikes

Starting  at 3rd level, you can use Fury to empower your melee weapon attacks. While raging, you can expand a Fury charge to make your melee weapon attacks deal additional 1d12 damage. Damage type is the same as your weapon damage type. You must announce the use of this feature before making a 'to hit' roll and the charge of Fury gets expanded regardless wether you hit or miss.

Last one standing

Beginning at 6th level, as you receive more and more strikes you become less and less concerned about what everyone is saying around you. While raging, if your health is below half total rounded up, you gain immunity to charmed and frightened conditions. If you were under the effects of these conditions when this effect started, they get suppressed until your rage ends.

Powerhouse

Beginning at 10th level, your critical strikes start to hit harder and faster than before. You gain a new way to use your Fury by honing it on the strikes that matter the most. By expending a charge of Fury as a bonus action, you can now choose either of the following bonuses:

1. Until your rage ends you can use your bonus action to make a single melee weapon attack
2. Until your rage ends your critical hit range lowers by 1
3. Until your rage ends you deal one extra damage die on a critical hit

These bonuses can be on at the same time, but you can not choose the same bonus twice in one rage.

Furious retaliation

Beginning at 14th level your Fury becomes so persistent that by anger alone you can disrupt actions of your enemies.

1. Whenever you receive damage from any being within your melee range reach while in rage, you can expand a Fury charge to make a melee weapon attack against the source of damage.

2. Whenever a creature moves out of your melee range you can use your reaction to expand a Fury charge and move up to it to the total of your movement speed