Path of the Colossus Weapon

A few barbarians reach the ancient path of the titan fighting style. The colossus weapon path shows how efficient and mastery there is in the martial style with oversized weapons. Or at least a small percentage of it.    

Fury of the Titans

Starting at 3rd level, when you go into rage, the aura of the giant ancestors surrounds you, increasing your strength and the size of your weapon a bit. Your size is considered Large only for the purpose of being able to use oversized weapons, if your weapon is normal size, it becomes oversized by duration of rage. Once in each of your turns when you damage a hostile creature while raging, you gain temporary hit points equal your Constitution modifier plus your barbarian level. If you already have any temporary hit points, you can only receive half of the total amount you would normally receive of this feature (rounded up).    

Destructive Rancour

At 6th level, while raging, when an enemy hit an attack against you within your reach, you can use your reaction to make a melee special attack against that creature. It must succeed on a Dexterity saving throw (DC equal to 8 + your proficiency bonus + your Strength modifier) or the target suffer your melee weapon attack effects and you can choose two additional targets you can see within 5 feet of it to take damage equal to half your Barbarian level (rounded down). The damage type is the same of your weapon's damage. In addition, any creature that takes damage from this feature is knocked prone. On a successful saving throw, you deal half damage to the attacker and no other effect takes place. You can use this feature a number of times equal to your proficiency bonus. You regain your uses of this feature when you enter in rage.    

War Cry

Starting at 10th level, as an action, you can raise your weapon above your head and let out a terrible battle cry. All hostile creatures within 20 feet of you must succeed on a Wisdom saving throw (DC equal to 8 + your proficiency bonus + your Constitution modifier) or become frightened of you until the end of your next turn. The frightened effect ends if the creature ends its turn with you out of sight or if it's more than 60 feet away from you. If a hostile creature makes a successful saving throw, you cannot use this trait on that creature again for up to 24 hours. Allies in the same 20 feet range gain temporary hit points equal your Constitution modifier plus half your barbarian level (rounded up) for 1 minute. You can use War Cry once per rage.    

Colossal Devastation

At 14th level, spending your action, an aggressive titan's aura envelops your body, exploding energy and impacting your surroundings. Hostile creatures within 15 feet of you must succeed on a strength saving throw (DC equal to 8 + your proficiency bonus + your Strength modifier) or take 4d8 plus your Strength modifier as bludgeoning damage and are stunned until the start of your next turn. On a success, targets take half damage but have no effects. Once you've used this feature, you'll need to finish a short or long rest to use it again. At 16th, 18th, and 20th level, damage increases by 1d8.