Tanker

Thanks to your immense training and raging, you now have learned how to tank a blow of just about any size. This then has allowed you to work on other parts of being a tank like being able to go head to head with a hydra in a battle of strength

Tank’s defense

Thanks to your tank like abilities, you now have no limit to your constitution

Tank’s charge

You have mastered the ability to absolutely destroy your foes when necessary. You now can roll 10d12 and add it to a strength save or check

Friendly RAGE!!!!!!!!!!!

You now have learned to share your anger with the rest of the party. Every time you rage you don’t benefit but all other party members are now raging until they meet the usual rage rules. It runs out separately

Ultra RAGE!!!!!!!!!!!!!!!

You have now been able to channel all your rage through your companions to the point to which they are now proficient with it. Each party member picks a barbarian subclass and now when you rage they gain its class features. This doesn’t apply to you. Additionally, your ac increases by 1d20 per a party member’s level(4max+80 to ac.)

Channel defense

You have finally found away to channel some of your hit points to someone else but only in an emergency. Whenever you rage, anytime someone deals damage to a party member you take that damage instead.