Path of the Steel Storm

Barbarian of the Steel Sorm burry their foes in an endless stream of weapon attacks each more deadlier than the last. When raging they become one with their blades to deliver a swift death to any who dare face them in combat.

Credit for the picture goes to Rod Wong.

Furious Stance

Starting when you choose this path at 3rd level, you ignore the two handed and heavy property of weapons you are weilding while you are raging. While you are raging you gain no benefits from using a shield. Additionally, if you have taken the attack action to attack with a melee weapon you are wielding in one hand this turn you can take a bonus action to attack with a melee weapon you are wielding in your other hand.

Cleaving Double Strike

Beginning at 6th level, when you take the Double Strike Bonus Action you may also make an attack against up to your strength modifier target creatures within range of your weapon, as your strikes cleaves through them.

Relentless Attacks

Beginning at 10th level,  you can attack three times, instead of twice, whenever you take the Attack action on your turn. 

While you are raging, if a creature makes a melee attack against you, you can use your reaction to make a melle attack against it. If your attack roll is higher than the creatures attack roll its attack misses as you slam away his attack.

Storm of Steel

Starting at 14th level, you can unleash a storm of attacks on a target. You declare a target creature. Your attacks against that creature have disadvantage. Whenever you hit that creature with an attack you make another attack against that creature. If you miss an attack against that creature your turn immediatly ends and you have disadvantage on all saving throws and cant take reactions untill your next turn. If the target dies or falls unconcious your turn immediatly ends.

Once you use this feature you cant use it again untill you finish a long rest.