Path of Colossal Weapons

Barbarians who Follow the the path of the Colossal Weapon can tap into certain magics when they rage, when these barbarian rage they can manifest giant versions of the weapons they wield.

Growth

When raging the Barbarian can grow their weapons to double its size dealing 1 extra damage die, this feature can be used equal to proficiency bonus + constitution mod per long rest can only be used for first attack.

Extended Growth

When you reach 6th level you can attack twice with your enlarged weapon.

Sacrificial Growth

When using your growth ability you can use 2 instances of growth and double your damage die.

Momentum

As a bonus action if you have used your growth ability this round you can take a 3rd attack with out the extra die.