Primal Path - Dual Mind

For some barbarians their rage results from their mind being split. Your body is shared by two personalities, the rage symbols your alter ego taking control. The condition might be caused by some traumatic event, extreme loneliness, a foreign being such as a demon, a ghost, or a powerful mage using you as a host, or even by some unnatural event that caused two souls to be bound together.

The main personality of your character might be completely hidden during the rage, possibly not even remembering what happened during it, or it can act as a passenger and helplessly experience the fighting without being able to do a thing. In the same manner the second person in you might be a constant voice during everyday life, only able to take control in stressful situations such as combat, or it might be dormant, popping out for short periods without knowing there is another person.

Did I Do That

Starting at 3rd level when you choose this archetype, you have different mental stats while raging. Use the same method for picking your Charisma, Intelligence, and Wisdom scores. If you rolled for them, roll again, if you used standard array split the values you've given to your mental score again, and if you've used point buy you may spend the amount you used on your mental scores to buy new values. You may have the same scores if you wish so.

In addition to the stats being different, the other personality can have a different alignment, bonds, flaws, etc.

Team Effort

Also at 3rd level, you have two beings able to combat any attacks against your mind. While raging you have resistance to psychic damage as well as advantage on all Charisma, Intelligence, and Wisdom saving throws.

Two Minds Are Better Than One

Beginning at 6th level, if you are Charmed or Frightened when you enter your rage, the effect is suspended for the Duration of the rage. If you become Charmed or Frightened while raging, the condition ends when you end rage.

Brothers In Arms

At 10th level, your other mind becomes stronger. As an action, you are able to switch to your alter ego without having to rage. You are able to choose which personality you wish to have control when you rage.

While your body still requires its normal amount of rest, any time spent as the passive personality counts as sleep for that personality.

Dual Fury

Startinng at 14th level, you can have both of your personalities assume control when you rage. If you do so you are affected by the haste spell for the duration of the rage.

The stress of two minds occupying a single body can cause the minds to crack. After a Dual Fury rage ends both personalities must make a Charisma saving throw with DC equal to the number of turns spent in the rage + 10 or become Feeble for 24 hours. A Feeble personality's Charisma, Intelligence, and Wisdom scores become 1.